W126 Heater Not Working

The Mercedes has a series of sensors that, working in concert with a computer, maintain a constant climate in response to the settings on the console. With that in mind, it can be tremendously useful to start off by looking at whether both, or just one, of your headlights have failed, and whether or not the high or low beam mode still works. Inside may require a combination of ac and the window heater, after a first wipe by hand. then it got to the point where it wasn't blowing hot air at all when at idle (i was out of town for work so i didn't have time to take it in). Turned the heater up to 30degrees and spun the dial on the. It could be the heater control valve, when we bought ours it was stuck open so would only have hot air available ( not ideal in summer) They are about £45 from ford, don't buy eBay ones as they don't last, fitting takes about half an hour. Re: Bobcat heater not blowing hot air. How to Replace Thermal Fuse for Samsung DV400EWHDWR/AA-0001 No heat or not enough heat #AP4201894. So we thought we'd put this myth to rest once and for all and answer "how does geothermal work in cold climates?" We'll start with a look at the science behind geothermal heating in winter, and some of the reasons that have contributed to the incorrect belief that geothermal heat pumps don't work in cold climates. Mercedes-Benz 560SEL Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor - 5 reports. Still not working. heater not working just blowing cold air on 2003 ford taurus SEL. When this occurs the coolant temperature never gets hot enough to heat the coils of the heater core which prevents the incoming air from being warm enough. Thermostat. 1268308162. The heater in my truck for some reason works, and then doesn't work again. sounds as though you have a blocked system, or it could just be you in car heater matrix, so undo both hoses to it and shove a hose pipe on one of the pipes and turn it on full blast and keep it on until the water goes clean then reconect and do not forget new anti freeze, then bleed your pipe again when your engin is hot with the controls on hot. what the op described its pretty much exactly what happend to me with my z. They are RF, so are not hard wired in. Having looked at the Haynes Manuaul problem could be either:- 1) Fan Motor 2) Three Position switch 3) Relay mounted at the back of the fuseboard As the fan is not working in all three positions it must be a fault that is common to all three speeds. my heater and fan have been working since. Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. So, given that Colorado's winter lows can drop to 20 degrees, homeowners often ask us: "Can a heat pump really heat my home, even when there's barely enough heat outdoors to pull inside?". 5 fuse that was there and put in a spare ten i had. I have an SLT with leather and cooled seats. She called me on her way to work saying she had been driving for 15 minutes and it wont blow hot air. The AC recharge kit that you have will not work, it actually doesn't even fit on the high. Ive tried swapping the hoses on the water pump but got no change. Blower on top of heat pump not working [ 1 Answers ] I have a Coleman heat pump that is less than 2 years old and has worked well up until a couple of days ago. the heater will not blow hot air ? As long as the valve is working you will but what happens is that the valve gets mechanically stuck. We have hoses, climate control units, compressors, vacuum valves, expansion valves, receiver/dryer units, temperature switches, HVAC valves, heater control regulators, mono valve repair kits, control valves, heater hoses vacuum change over valves, 3/2 valves. What Will Cause the Temperature Gauge to Go Down While You Drive & the Heat Not to Work? by Richard Rowe The cooling system isn't the most complicated system on your vehicle's engine, but it can still malfunction over time. it caused a breaker to blow and a few outlets to stop working aswell. Any luck on those pictures? I've taken a look under the seat to try and make sense out of the mess under there, but haven't had much luck identifying what's what. If your heat is not working, the first thing to do is figure out why. Why Is My Heater Not Working? A car heater that isn't working could be caused by several simple issues. If only the heater is not working, chances are the problem is not the fuse. There are other ways to work around the problem, too. This may appear too simple for words, but you would be amazed how many people will actually over react to a mechanical problem and run out and buy parts BEFORE they troubleshoot the problem. If the heater in your ford explorer not working. It has the usual sleeper controls on the wall with low and high fan, AC or heat and a dial thermostat. Second, ensure that the gas valve has pressure. i get nothing but cold air from my heater now. No one knows what's wrong. What should I look. I shut it down and turned the gas line off and figured I'd look at it over the summer. What Will Cause the Temperature Gauge to Go Down While You Drive & the Heat Not to Work? by Richard Rowe The cooling system isn't the most complicated system on your vehicle's engine, but it can still malfunction over time. So, without the core working properly, the auto heater control tries to drive the door further open when you turn on the heat, figurring that it's not getting enough heat because its not open enough. All Models. Because the water heater will be hardwired in, this part of water heater troubleshooting involves checking the circuit breaker to see if it's been tripped. Is the heater blowing cold air into the car, or is the car heater not blowing any air at all?. The driver's side blows cool air, the temperature is set at the highest it can go (84 degrees) and I'm positive the "snowflake" button isn't on, the direct vents buttons for both sides are also on. All this to no avail. If the heater will not turn on, make sure the power source is working properly. Has anyone got some advice please. Mercedes S-Class w126 for sale Enter your email address to receive alerts when we have new listings available for Mercedes S-Class w126 for sale. Don’t get me wrong, the BMW and Toyota still had strong engines, it. For Gm Chevrolet Tahoe Yukon Ac Climate Control Button Repair Decals Sticker. If the current completely stops because it is malfunctioning, then your air conditioning or heater blower motor is not going to function. Inside may require a combination of ac and the window heater, after a first wipe by hand. The water heater should have 75 percent of its capacity as hot water. The air conditioner still works because I can feel a little cold air coming from the vents when I hold my hand up to it. Any suggestions?. Step by step instructions on how to replace a Thermal Fuse for Samsung DV400EWHDWR/AA-0001 No heat or not enough heat #AP4201894. The top supplying country or region is Hong Kong S. Ford Escort Heater Problem. One of my heating zones is not working The problem is that the 3rd zone (upstairs) only kicks in when the 1 zone (basement) is working. Raymond Order. Shop right now!. World Upholstery & Trim manufactures authentic reproductions of restoration trim parts for classic Mercedes-Benz cars. Fits all Second Generation North American W126 Coupes & Sedans produced from 1986-1991. Our team offers a wide group of products for sale at a range of pricing. Interior Guides. A small amount of hot coolant is diverted into a hose fitted into the firewall and then into a small heat exchanger or heater core. No - Ford 2010 F-150 question. Replaced the fuse and the blower works just fine. Just to be sure, I had the system checked and it was not low on refrigerant. Ford vehicles have a problem with the blend door. I have a 1999 Ford F150 and my heater has stopped working. Now it will not even ignite at all. I changed my Thermostat and Heater control Valve to find out a pencil fell in the defroster and prevented the door from closing. • Always disconnect the power source before working on or near the unit. Heater For Sale. Many owners do not realize that the instrument cluster is just pushed into the dash panel and not held in with any bolts or screws. Heater not working on 2010 f-150 Heater is not working. MB 126 - W126 Service Repair Manuals. There is also a high pressure service port. There are many reasons why a car heater stops working. Basic troubleshooting can help you locate the issue. Sadly, as in all walks of life, not everyone online is as honest as we'd like (Caveat Emptor). The rear blower works and blows cold air. It has all options available at the time. The 2013 Chrysler 200 has 3 problems reported for heater not working. The heat selector knob seems to work correctly when moved to the cold position it gets really cold and all summer the a/c blew ice. Just to be sure, I had the system checked and it was not low on refrigerant. The driver's side blows cool air, the temperature is set at the highest it can go (84 degrees) and I'm positive the "snowflake" button isn't on, the direct vents buttons for both sides are also on. When the engine coolant reaches operating temperature, feel the heater core inlet and outlet hose to see if they are hot. Any suggestions?. The Mercedes Benz fan blower motor regulator is a series of resisters in a printed circuit board about 2-inches square located right next to the blower motor. Turned the heater up to 30degrees and spun the dial on the. The heater does not work at any speed, this can. The air conditioner still works because I can feel a little cold air coming from the vents when I hold my hand up to it. ITEM: 1997 - 2001 TOYOTA CAMRY HEATER A/C AIR BLENDER DOOR SERVO MODE MOTOR ACTUATOR Lifetime warranty! This part will outlast your car, we have been in business for 12 years and plan on selling this part for a long time! We have an electrical engineer review all parts and no one does a better job. Heater Cores and Blower Fans. DonL DonL, Jul 18, 2011 #6. It recently passed the strict Belgian classic car inspection WITHOUT comments! 17 cm (L) longer version for superb comfort. For heat pump problems, see Heat Pump Troubleshooting & Repairs. Make sure the demand does not exceed the capacity of the water heater. door assit not working can hear. However, with modern cars, the solution is usually more simple. The door ajar light would not turn off nor would the dome light so, like the OP, I stuck a screw driver into the dome light to pop the cover off and shorted the thing out. Is your air conditioner A/C not working or blowing hot air? The Air Conditioner system can get very complicated in cars but that doesn’t mean that you can’t perform some troubleshooting yourself. After tearing the dash cluster apart and testing the switch panel I now know that is not my problem. A month or so ago I tried using the heater and it took forever for it to warm up. If the blower motor is malfunctioning, the defroster will not work. The W126 was the second generation to officially bear that prestigious designation, an abbreviation for the German Sonderklasse or "special class. From sunny Florida. Because the water heater will be hardwired in, this part of water heater troubleshooting involves checking the circuit breaker to see if it's been tripped. The make and Model of the Heat Pump would help you get the correct answer. If you are not sure if the switches are the problem, we recommend you get the covers off and power the motor directly with a 12 volt power source. The bedrooms are nice and warm, but the rest of the house is cool, it will not get above 64 degrees, and the colder it gets outside, the colder the downstairs gets. there are no leaks. They will not work in Mercedes. Mercedes-Benz W123: W123 designates the executive line of cars, manufactured by Mercedes-Benz between 1976 and 1985. what the op described its pretty much exactly what happend to me with my z. But the cabin temperature does not reach the temperature that I set it at. But heat pumps only work efficiently if they have a backup heat source, like a gas furnace or electrical resistance coils. But in auto modes the timer will not advance if the heater coil is blown. Any suggestions to what may cause for the heater to not work properly. 1988 w126 Mercedes 300SE heater only works after stopping the car and restarting after a few minutes. The the distinction between Heat and Work is important in the field of thermodynamics. After checking things out myself for small problems with the electrical box, etc, I noticed. To explain what we mean, first we'll need to look at how a heat pump works and why it needs backup heat. If the heater valve is faulty doesn't it usually stick in the open position?. Mercury Sable (or Ford Taurus) Heater Is Not Working We get a lot of questions about cars that have suddenly or gradually lost their cabin heat. The worlds largest selection of new, used and reconditioned Mercedes-Benz 126 chassis air conditioning and heating parts. The heat was working fine three days ago. It's all a bit academic really. For models with a system selector switch, turn the switch to Emergency Heat and wait six hours. I do not know what the problem is. Left or Right hand side. DA: 50 PA: 96 MOZ Rank: 80 Mercedes W201 W124 W126 Sunroof Not Working?. Enjoy your day. I do not have dual zone climate control. Used, For B-enz A-Class W169 B-Class W245 Blower M. Mercedes Fuel Pump W123 W124 W126 190E 300SE 260E 380E 450E OE 0020919701 Delivery Nationwide - Door to Door This is a brand new, affordable OE Specification aftermarket replacement product. The fan speeds option worked. We focus on an extremely comprehensive group of items available for sale at hard to beat prices. It may make the most sense to take it to a professional. Here we look at how to handle furnace problems from a furnace working poorly to a furnace not working at all. Shop with us and receive fast shipping and a free warranty on your order. Dodge owners manual shows the 40 amp blower fuse, #25, but does not mention any blower relay in the PDC. When you say "I still do not have enough" this suggests to me that you had the same problem before getting the new heater. For Gm Chevrolet Tahoe Yukon Ac Climate Control Button Repair Decals Sticker. 2001 tahoe front heater not working, rear heater blows warm air We have a 2001 Chevy Tahoe with front and rear heating and a/c. If you're having problems with your car not heating up, or your heater isn't working we'll take a look at some possible causes and solutions. The fuse numbers are not included in the manual. 7 million cars. To check for a plugged heater core, start the vehicle and allow the engine to warm up to normal operating temperature while turning the heater to its hottest setting. Could it be the fuse? If so, which fuse is it? I looked in the manual but seat heaters are not listed. - The heating/ac system isn't working on any blower setting (1,2,3, or 4) - After the car warms up when I drive fast warm air will leak out eventually warming the car slightly. (1) Heat didn't work at all (2) Engine reved to 2,000 RPM even after getting up to temp and then started to overheat (it's zero out!). Help!! Heat not working on SMART HAve any one else experience this issue. - Replaced the Blower Motor Switch, didn't work. The make and Model of the Heat Pump would help you get the correct answer. what the op described its pretty much exactly what happend to me with my z. Blower on top of heat pump not working [ 1 Answers ] I have a Coleman heat pump that is less than 2 years old and has worked well up until a couple of days ago. The fan speeds option worked. What Will Cause the Temperature Gauge to Go Down While You Drive & the Heat Not to Work? by Richard Rowe The cooling system isn't the most complicated system on your vehicle's engine, but it can still malfunction over time. Defrost, vent, foot. For starters, while candles do add some extra warmth to apartments, it's almost certainly not enough to do the trick if your apartment heat isn't working properly, to begin with. Driving with a frosted windshield or fogged rear window and no way to clear it off can lead to limited visibility and dangerous driving conditions. Only want to use it to dry towels in the bathroom and it will work on gas but if somethings not working it bugs me! The fuse on the switch has been changed so unlikely to be that, the fuse on. 190E heater not working help please! 1989 W126 300 SE. World Upholstery & Trim manufactures authentic reproductions of restoration trim parts for classic Mercedes-Benz cars. 1998-2011 Grand Marquis Climate Ac Heater Control Module Temp Eatc Digital Auto. Mercedes-Benz 560SEL Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor - 5 reports. However, with modern cars, the solution is usually more simple. Second, ensure that the gas valve has pressure. Any suggestions to what may cause for the heater to not work properly. The W126 was the second generation to officially bear that prestigious designation, an abbreviation for the German Sonderklasse or "special class. In this section, you'll learn how to maintain and upgrade your E-Class's interior. Reasons Your Car Won't Heat | Heater Stopped Working Heat in automobiles is supplied by hot coolant circulating through the engine. But, the rear defroster button is sticky. So this all happened when someone plugged in a space heater into a bedroom outlet. I'm frustrated. Not only are they a hassle in. Heat is the transfer of thermal energy between systems, while work is the transfer of mechanical energy between two systems. Thermostat. When I turn it on after a few seconds I hear a clicking under the dash. The heater/blower fan in the front has quit working on all speeds. Got diagnosed with a dealer. If it is not working, the engine will not be operating at the optimum temperature. LKQ Online has a large selection of new and used parts at affordable prices. Reasons Your Car Won't Heat | Heater Stopped Working Heat in automobiles is supplied by hot coolant circulating through the engine. Heater core. If the inlet hose is not hot: the thermostat is not working correctly. The blower for my heat and air conditioning just quit working in my 2008 Versa after 22k miles. Why the heater dont work? I turn on the heater on my Amana heater and a/c unit and only blows cold air, it seen to be working good but does not heat and still not. i have an 89 560sel. What Will Cause the Temperature Gauge to Go Down While You Drive & the Heat Not to Work? by Richard Rowe The cooling system isn't the most complicated system on your vehicle's engine, but it can still malfunction over time. Chrysler has issued a service bulletin #24-001-16 dated 1-9-16 to address an issue with car heater not working in Dodge Grand Caravan and Chrysler Town and Country vehicles. I switched the temp setting from cold to heat back and forth several times and it seems like the heat is now at least luke warm. the re circulation pump, place the blade of a screwdriver on it and the handle to your ear and you should hear the pump motor running. When you say "I still do not have enough" this suggests to me that you had the same problem before getting the new heater. For heat pump problems, see Heat Pump Troubleshooting & Repairs. It seemed that on really cold mornings the heater would not get warmed up before I made it to work. no heat on the W126 cars is a faulty mono valve insert. I was told the elements were shorted and that noise is a circuit breaker clicking. Open Hours: Monday through Sunday: 8am - 10pm CDT/CST. Problem with this is that you must remove and open the heater to fix it. You can diagnose and fix the problem yourself or visit your local mechanic for a repair. 00 call on. However, with modern cars, the solution is usually more simple. Learn about this problem, why it occurs, and how to fix it. A/C or Heater does not come on and has not come on since I bought her. I am thinking about purchasing a new RELAY. Many owners do not realize that the instrument cluster is just pushed into the dash panel and not held in with any bolts or screws. The heater in my truck for some reason works, and then doesn't work again. Earlier this summer the heat stopped working one night on a cold ride home. To check for a plugged heater core, start the vehicle and allow the engine to warm up to normal operating temperature while turning the heater to its hottest setting. it does not matter where i have the air directed, defrost, vents or floor i get the same. A small amount of hot coolant is diverted into a hose fitted into the firewall and then into a small heat exchanger or heater core. The seat heater on the driver side on my GLX doesn't work but the passenger side does. then it got to the point where it wasn't blowing hot air at all when at idle (i was out of town for work so i didn't have time to take it in). 032) and enjoy Fast Shipping Warranty Original Used Parts. The rear blower works and blows cold air. Heater is not work is not working 2 Answers. Does the temp coming out change when moving the lever/knob?. Warmish air maybe but obvious that something is wrong. The front display does not have any scratch. My heater only blows out luke warm air and my AC cycles on and off, even with the switch in the off position. It may even be that your thermostats are not working correctly, in which case you may need to replace them. Here we look at how to handle furnace problems from a furnace working poorly to a furnace not working at all. Hi, My blower motor has stopped working (even on high speed without using resistor). To find out what's wrong with your car's heating system and what you can do to fix it, you first need a basic read of the situation. Talk about failure! I had a customer. Shop with us and receive fast shipping and a free warranty on your order. But there is no doubt the 126 280 would be quicker than the ADR27 compliant 116 280. well, the car is keeping me busy again. Make sure the burner area of the water heater is cool; if not, allow it to cool completely. I have checked the resistor pack (first i put power to the motor and it worked, so i assumed it must be the resistor pack, bought a new one from MINI, still no blowers). The heat in the apartment isn't working properly, landlord isn't fixing hold off on supplementing with a space heater, if you can. Has anyone experienced problems with the heater not working? With winter around the corner I turned mine in today and it's not blowing hot air. 1998-2011 Grand Marquis Climate Ac Heater Control Module Temp Eatc Digital Auto. 0008304958 W126 Oem 86-91 Mercedes-benz (36. Shop with us and receive fast shipping and a free warranty on your order. It may even be that your thermostats are not working correctly, in which case you may need to replace them. The engine needs to warm up quickly and stay hot during operation to reduce internal engine wear. item 1 w126 MERCEDES 1987 420sel AC CLIMATE HEATER CONTROL MODULE 1268301185 - w126 MERCEDES 1987 420sel AC CLIMATE HEATER CONTROL It did not work and I am. Most of the problems with heaters not working correctly can be attributed to faulty thermostats. The heat selector knob seems to work correctly when moved to the cold position it gets really cold and all summer the a/c blew ice. The switch works and the lights turn on when i turn the ac and heater on. door assit not working can hear. Pin Wrench Socket. Replaced the fuse and the blower works just fine. The following are the causes and solutions for electric heater not working: 1. My mechanic found a in line fuse for blower blown. With that in mind, it can be tremendously useful to start off by looking at whether both, or just one, of your headlights have failed, and whether or not the high or low beam mode still works. They said "CHECKED HEATING SYSTEM AND FOUND HEATER CORE IS PLUGED NOT ALLOWING HEAT TO ENTER CABIN". Mercedes S-Class w126 for sale Enter your email address to receive alerts when we have new listings available for Mercedes S-Class w126 for sale. Second, ensure that the gas valve has pressure. Was working fine yesterday but now nothing. I have a similar problem with the heater in my 190E. it does not matter where i have the air directed, defrost, vents or floor i get the same. Ensure the water heater has power. Mercedes vito/viano rear hella behr heater blower motor any questions contact please. Showcasing Cover Working in stock and ready to ship now on the internet. My Hyundai Verna/Accent heater is not working. - The fuse is blown for the heating/ac system, replaced fuse, blew when I turned on the car. Though forced-air furnaces are normally quite reliable, they can break down. The coolant needs to be flushed and replaced. Unfortunately we can not say the same about the BMW or Toyota. For models with a system selector switch, turn the switch to Emergency Heat and wait six hours. Beautiful V8 with a quiet motor and silky smooth transmission. Interior Guides. The heat selector knob seems to work correctly when moved to the cold position it gets really cold and all summer the a/c blew ice. Certainly doesn't sound like a heater core issue to me. Both hoses are hot going in and out of firewall. My mechanic found a in line fuse for blower blown. I have never had this problem before. Is this a common fault? I. Even after the car is warmed up and has been driving for 30 plus minutes the heat does not blow. Is the radiator cap leaking? Is your overflow tube hooked up and is the tank intact? If your car has A/C, your heater core could be leaking and draining the leaked coolant through the condensation drain to the ground. Hi everyone, I'm starting to get a few chilly morning and have needed to use the heater in the car. my heater and fan have been working since. But a 560 SEC ECE, with 300 hp from the factory, was measured at 182 hp in the same dyno, so there you go! You can see big clouds of blue smoke exiting the tailpipe after each pull. Save Share. Troubleshooting Gas Furnaces and Gas Heaters - Most problems with gas furnaces are fix-it-yourself jobs, such as changing the filter. - Replaced the Blower Motor Switch, didn't work. Bad Blower: The heating and defrosting system rely on an electric blower motor to move the hot air into the cabin of the car and through the defroster vents. Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. House heater not working? A/C works, Controller seens to be working, and the gas is lit, we had got a new pilot about 4 months ago, heater was working for about 2 months, but all the sudden it just stopped working. Vacuum components not tested. Having looked at the Haynes Manuaul problem could be either:- 1) Fan Motor 2) Three Position switch 3) Relay mounted at the back of the fuseboard As the fan is not working in all three positions it must be a fault that is common to all three speeds. Check that the electrical socket is working properly by plugging in a known working appliance and checking that the circuit breaker is working. Fuel Pump BOSCH buy online, 0580464125 Best price & Shipping by Car Parts, Accessories shop Сars245. Any ideas to what might be causing this, if so what parts will need to be replaced/rep. There can also be a problem with the wall electrical outlet or your home's electrical supply. Any luck on those pictures? I've taken a look under the seat to try and make sense out of the mess under there, but haven't had much luck identifying what's what. The engine needs to warm up quickly and stay hot during operation to reduce internal engine wear. Please scroll down to see this site's ads, plus cars for sale. For outside windows the wipers work, although you may want to wipe the rear window first by hand. Finally, if the thermostat is receiving power but is still not working, replace it or the electric water heating element. We aim to respond within 1 working day, UK GMT time. i started noticing the heater didn't seem to blow as hot when not moving but thought i was just crazy. I have 16,500 Miles on my Smart and I can not get the heat to blow warm air unless its turned all the way to max at 80-85. (1) Heat didn't work at all (2) Engine reved to 2,000 RPM even after getting up to temp and then started to overheat (it's zero out!). We focus on an extremely comprehensive group of items available for sale at hard to beat prices. Submitted by ljelliott on October 3, 2018. 1268308162. item 1 w126 MERCEDES 1987 420sel AC CLIMATE HEATER CONTROL MODULE 1268301185 - w126 MERCEDES 1987 420sel AC CLIMATE HEATER CONTROL It did not work and I am. Our team offers a wide group of products for sale at a range of pricing. Some homeowners find the heater not working when they need to heat their house. If you have some hot water, but it’s just not hot enough, it may be that you need to adjust the temperature on your water heater thermostat. I thought you just had to see the last one I pulled out of a Mercedes engine. IF your hoses are warm, turn on the fan. While transporting it from Utah to Nevada it became very apparent that the heater is not working on the drivers side and therefore the rear passenger area. Sometimes acting as an air conditioner and sometimes as a heater, a heat pump can do it all. The 10 tips provide sound like it would help prevent anything serious from happening. The the distinction between Heat and Work is important in the field of thermodynamics. Shop with us and receive fast shipping and a free warranty on your order. When this occurs the coolant temperature never gets hot enough to heat the coils of the heater core which prevents the incoming air from being warm enough. i have a 92 300se. i am trying to figure this out. I changed the thermostat in the 3rd zone but to no avail. Though working in hot temperatures is probably bad for your equipment and tools as well. Mercedes-Benz 560SEL Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor - 5 reports. If your Ford F-150 truck heater isn't working you will want to get it fixed before cold weather sets in. Mercury Sable (or Ford Taurus) Heater Is Not Working We get a lot of questions about cars that have suddenly or gradually lost their cabin heat. When bleeding the system turn the heater on full blast to force any air out of the heater core. what the op described its pretty much exactly what happend to me with my z. Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. With that in mind, it can be tremendously useful to start off by looking at whether both, or just one, of your headlights have failed, and whether or not the high or low beam mode still works. when working normally, rotating the wheel to max heat is not really necessary. The W126 is about 50kg lighter and has superior aerodynamics. You cannot reduce or raise the temperature because the blend door is binding in the stuck open position. If you do have to take the box down, look the insulation at each of the 4 corners there are slits cut in th insulation to get at the attaching bolts. The fan works but it's not blowing any hot air, only cold air. Sounds like you may have a blown heater coil. Any suggestions to what may cause for the heater to not work properly. Average failure mileage is 30,000 miles. It turns “on” and “off” the rear defroster. Pampered luxury Mercedes with only 222,000 miles. Several commenters have kindly provided detailed analysis of some of the reasons why air-to-water heat pumps may be costly to operate. i get nothing but cold air from my heater now. Note: This video is intended to give you the general idea of the part replacement procedure.