It will have 4 wires protruding from the connector: A black w/ white stripe, yellow, white and green are the clor of the … If the car’s blower fan isn’t working, you won’t get enough heated or cooled air onto the windshield to defrost it. What I found when my fan blower suddenly quit working, inop on all speeds, on my 2008 Ford Focus. Hi There, The resistor is what controls the speed of the blower motor, not the relay. Leaving work (15 deg ambient) it comes on immediately and all the switch settings work. This device will usually be located near the blower motor under the dash, and will have an electrical connector with 4 to 5 wires coming out of it. This is why at the bottom of the article we include a 2008 F150 blower motor wire diagram. All power to every one of the electrical working parts of the car is supplied via fuses. It is very likely that the blower motor switch will no longer work. the blower motor is below the glove compartment. I can hear the motor running and changing speeds, but only once in a while it will actually blow the air through the vents. Either the blower isn't working, in which case you may get warm air but not much of it, or it is blowing air but it may not … The air conditioning is not working in the front either. If the heater isn't blowing hot air at you when you turn the system on, the blower fan might have a problem. Is … When the AC in a car is not working, driving can be an unpleasant … 4. Or it may run at maximum speed on all settings, or just work on maximum and not on lower speeds, or it may simply not run at all. If the blower motor is malfunctioning, the defroster will not work. There are a few possible reasons why your engine's coolant may not be heating up. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Check the fuse with a multimeter. There are also some instances where the blower motor may not work at all. And a heater blower speed resistor Can't understand why they would replace the blower motor if as you say it works on setting 4. PPS: Someone mentioned the possibility of the culprit being the blower motor’s “resistor” but I thought the resistor only controlled the fan speed. Ignoring a damaged blower motor resistor may lead you to bigger AC or heater-related problems. Vehicles affected include the Corsa D (2006 onwards). The blower fan. Well your blower motor is fed via a Fuse (fuse 23 (which is 40amp) then two relays (relay 1 and relay 2). Issues can range from a blown fuse to a bad blower speed controller. If fuse is good make sure you have 12 volts to fuse 25 when the car is running. Luckily, unlike many systems on the modern motor car, heating systems are more or less built around the same design as they were 20 … The first thing I would check is the blower motor resistor. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. It's no fun getting into your car on a frosty winter's morning only to find the car heater not blowing hot air. Blown Fuse or Loose Wiring. I used a small knife to scrape inside the plug. Why is my car not heating up? I just replaced the battery on my 2002 nissan pathfinder se 3.5,but when I try to start the car all lights on instruments panel turn off and stay off until i remove one … Jump to Latest Follow 1 - 9 of 9 Posts. The blower fan located behind the dashboard pushes air through the climate control vents. Why is my car heater not working? If the resistor fails, generally, the blower will only work on select speed settings. If your resistor’s condition diminishes greatly, it will leave the car blower not working on all settings. Importance of replacing a broken blower motor resistor. ... Our 2008 Ford Escape XLT has the same problem with the blower fan not working on the first three settings. I swapped out the 40 amp fuse but no joy. Many Vauxhall and Opel owners have experienced a problem with the heater not working properly. Blower motor doesn’t work in certain settings. There are several signs that you can look for to tell if your blower motor might be on its way out—for instance, if your HVAC blower does not operate at different speed settings or doesn't work at all, that could be a sign the motor is on its … 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. So blower does not come on in all fan positions Do the wipers work If wipers work then its probably either the blower switch blower motor or fuse 25 assuming wiring is okay. it is located (on this particular vehicle) to left of the blower motor. Car Heater Not Blowing Hot Air: A Bad Blower Fan Motor. The blower motor is working. Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on Ford cars and trucks. The blower motor resistor or blower module gets hot as it powers the fan so, often times, they can burn out causing certain speeds of the fan in your car to stop working, the fan can be stuck on one speed, only work on high speed, or not work on any settings. One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all. If the fan operates at some speed settings, but doesn’t work at some other speed settings, this means that the blower resistor is faulty and should be replaced: Another symptom of a faulty blower motor resistor is that the blower motor cannot operate in some settings. PS: Car is 2007 Toyota Corolla. Learn how to check your coolant level here. Owners may experience an intermittent heater blower fan, on one or more of the speed settings, or the fan may not work all, or will only work on full power, or may be … When this happens, you may notice that you will not feel anything blowing out of the vents at all. 2013 Cruze AC/Heater Fan/blower not working on any fan speed settings. A wiring diagram for the specific vehicle is also helpful. Blower fan. When the resistor is working, it reduces the amount of voltage going to the lower fan speeds, so the fan runs slower. The resistor limits electrical current so that the blower operates at the correct speed. My heater blower has been working just dandy until today, it has just stoped with no smell or noise, all 4 speeds are now not working, not sure which fuse it is but i have checked them all and are all fine, … The blower for the back of the vehicle is stuck on and is blowing hot air. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. Solution: A repair shop will check the wiring and related parts to determine the cause of the problem, and then fix it. High speed uses no resistors so the blower gets full power and turns as fast as possible. It's job is to add more resistance to current flow with each lower speed. This will cause the blower motor to operate incorrectly or not at all in one or more settings. I would have to agree with the rest of these fellas, blower motor resistor. A car heater that isn't working could be caused by several simple issues. However, with some squirming around on your back, a long shaft Philips screwdriver and so on it can be removed and replaced by a "normal person". It really just 3 resisters wired in series all inside one … After 10 min all switch settings work although setting 5 does not seem to be full power, but it's close. I've tried all the different vent settings. A motor failure will obviously may cause the fan failure, causing an overall car heater failure. Either it's not getting electrical power or, … Since speed 1 and speed 2 use the speed 3 resistor to drop there voltage and speed three is not working as well my guess is the speed three resistor is burnt out in the device referred to as the blower motor resistor or blower motor … Bring broad knowledge of electricity and specific knowledge of the use of electrical testing equipment. [The Focus Haynes manual has a small section detailing the heater blower removal and the location of the resistor pack] In my case I had the A/C and the fan stop working on settings … but no air movement.) To determine the cause of a blower fan failure, isolate the motor, and perform some basic electrical tests. If one of these components fails, the system can stop working. Fixing the motor should solve the problem in this case. The most common thing would be the resistor assembly, as that goes out more … The gauge/coolant temperature sensor Is the gauge actually working? Coolant level Take a look at the level in the expansion tank, preferably when it's cold. Sometimes, the owner gets a warning that all is not well, with one of the above faults occurring intermittently. Fortunately, you can check the state of the component through the blower … Diagnosing the reason that your air conditioning isn’t working will help you determine whether the problem is one that you can fix yourself or if you need to take it to a repair shop. Also, The blower level 5 in the front part stopped working. The blower fan will not work on settings 1, 2 or 3 but works fine on settings 4 and 5. My 1999 Olds Delta 88 heater fan switch turns blower on only occasionally and even then the high setting cuts off the fan(if it’s working). When the blower is running, it seems to decrease speed when I turn or slow down. M ... Just had the fan stop working in my car today (everything shows up as working on the display, etc. The rest of the time it seems to be … It's almost as unpleasant to have a heater that's not giving out enough heat. With that said, failed blower resistor assemblies don't solve all of the possible failures. While not being able to turn the air conditioning off is a problem, not being able to turn it on in the first place is arguably worse - whether you rely on it to help you to demist your windscreen in the winter or to keep you cool behind the wheel in the summer. I have a 2005 Dodge Dakota and I am not getting any air through my vents. It stopped working on a very cold day, my hands were freezing. In this case, it’s best to take the car to a certified auto electrician. It only works on high. Not a car person - but had a 2005 without this issue - don't know if i got screwed and need transmission work. Driving with a worn blower motor resistor could further … You might be best to get a Auto electrician (not a mechanic) to check the circuit out. If I shut the car off it will not come on for 3-5 minutes. Driving around on a hot day in a car without a working air conditioner can be uncomfortable and even dangerous in extreme heat. Hi guys, i'm sure this has been posted before but couldn't find it when i just searched so sorry if it has! The heater, defroster and A/C still all work fine. Alternatively, if the thermal trip blows, the heater blower will be dead on all settings. It will not turn off and it won't blow cold air. A blown fuse might just be the reason your car heater fan is not working. I checked the fuses, all … If power is present on the fan’s terminals and the fan is not working, the blower fan is defective. ProTech: Probably a bad blower motor resistor you have there, or possibly a faulty blower motor or switch. It can look good but be bad. If it’s not the fuse, I think it’s probably the motor itself located under the glove box.