Why does my heater fan only work on a high speed and how do I fix it?
try replacing the blower motor resistor
The blower motor speed resistor is burned out. Read More
Check the low speed relay and the resistor at the motor Read More
do you mean the speed of the fan? if so, it'a relay generaly near the motor of the fan. If it's the heat who only came at high speed, you need to add some antifreeze. Read More
blower motor resistor is burned out Read More
2004 Chevy express van, heater has no high speed, at one time the blower stayed on even when the ignoton was turned off therefor draining the battery, Read More
The blower motor resistor pack is bad. Read More
The blower motor speed resistor is burned out. The high speed function bypasses the resistor. The speed resistor is generally located near to the blower motor. Read More
Defective heater resistor pack. Read More
If all speeds do not work, suspect the fuse, the switch, the switch connector or the blower motor. If only high speed works, suspect the blower motor speed resistor. If low speeds work and not high, suspect the blower motor relay. Read More
If you mean the fan - replace the fan speed resistor if the fan only works on high speed. Please supply more information - no heat or cooling? Does fan work? Does mode switch work? Read More
It means that when it only worked on high, that the resistor in the blower fan wiring went bad and the only speed the fan would run on would be a speed where NO resistor was being used, which is the high setting. Your fan went bad because it WAS only running on high for so long and now the entire assembly needs replaced. It's a PITA to get to because it's up in the… Read More
Maybe because your climate control system needs to be repaired.... Read More
I have a 1990 Toyota Corolla and it did the same exact thing as yours and eventually only high speed would work and further investigation revealed the fan switch in the heater control assembly as the culprit. The contact points in the switch had all burned up except for the high setting so I went to the dealer and got a new one and no complaints yet. *********************************************** Jvrsshurricane is right, but more often the… Read More
Why does my 92 Mazda 626LX car heater and AC work on lower settings but cut out completely on full power?
Your '92 Mazda 626LX car heater and AC might work on lower settings but cut out completely on full power because of a faulty rheostat. The fan speeds will not work correctly when this part is bad. Generally the high speed function bypass's the blower speed resistor. The high speed function uses a relay instead. I would start with checking the high speed blower relay. Read More
If its the fan speed your talking about its likely that the speed controller on the fan is broken and had its days Read More
12 speed, you mean 1 or 2 speed? Anyway, when a fan speed control only works on high it almost always means the Resistor Pack is defective and needs replacing. It can be the speed control itself but it is highly unlikely. 99% of the time it is the Resistor Pack. Read More
try replaceing the switch that controls the low to high for heater It's gonna be the blower motor resistor (near the blower motor). Read More
toyotas have a resistor bank in line with heater motor each speed has a different value resistor. there is no resistor on high speed. it is located on passenger side in heater duct I thank it has two screws holding it on when you get it out you will see the resistors burned Read More
your heater resistor is on its way out ..some are built into the heater motor some on a separate board depending on the make and model of vehicle Read More
Defective Heater Resistor Pack. Read More
Most likely and bad blower motor resistor. Read More
You most like have a bad blower motor resister....... Read More
1996 Nissan altima heater ac switch will only work on the high 4 won't work on 1 2 3 changed switch still the same thanks for answering?
Heater Blower Resistor Read More
from what i have read it is the blower motor resistor it goes bad and only lets the fan run on high google blower motor resistor and read on Read More
The first thing that you need to check will be the coolant level.................. Read More
If you are saying the Blower Motor only works on high, then your problem is a defective Blower Motor Resistor Pack. Replace it. Read More
If only high speed is effected check the high speed relay and/or the fan switch/electrical connections for problems. Read More
Without knowing the symptoms, I can't pinpoint an answer. However, the most common problem with heater blowers are the resister stacks. When they fail, the fan only works on high speed and does not work on the lower speeds. It is strictly a dealer part around $30. Easy to replace. Read More
How do you get a MP3 player that is plugged into a non high speed hub that needs a high speed high speed hub to work?
Get a high speed hub. Read More
Most likely a failed blower resistor. Read More
The fan control module in the engine compartment has gone bad. Read More
blower motor resister is bad Read More
Resistors control the speed of the AC/Heater fan. These resistors are switched on and off in various combinations to create the different fan speeds. When the resistors burn out your fan will only work on the "HI" setting. The "HI" setting doesn't use any of the resistors and that's why it works. These resistors are near the blower and the blower is beneath the dashboard on the pasenger side. Just have to located resistors now. Read More
If the one speed it works on is high speed, it is the blower motor speed resisitor that is bad. Read More
fan speed control switch is bad. Replace it as long as the other speeds work fine. Read More
2004 dodge ram ac and heater problem The heater and ac only work when the setting is set to high If it is set to low or medium the heater and or ac do not work. Can anyone help?
The blower motor speed resistor is burned out. That part should be available at your local auto parts store. I believe the resistor is located under the hood, passenger side on the firewall, close to the blower motor. Two small screws hold it to the HVAC box. Read More
The most common cause is a failed blower motor resistor. Read More
There is a resistor pack operated by the fan switch. It has failed. You need to replace it. Read More
No, a data/fax modem only can operate at a maximum speed of around 56kbs downstream which is not classified as high speed. High speed is usually considered 128k downstream and up. In addition, it can only be connected to a traditional phone line - it can't be used through a cable line. Read More
those trucks had common problem of the blower motor resistor going bad or burning out and it would only work on high speed. the resistor is located under the passenger side dash by the blower motor. hope this helps Read More
I would suspect the blower motor speed resister is shot. Read More
If you are referring to the blower motor only working on the high speed setting, then the problem is the blower motor Resistor Pack is defective. Replace it. It can be the blower motor speed control switch but not likely. Read More
It may be the resistor pack along the firewall under the fuse cover somewhere. This controls the speed of the fan. Read More
Why will the heater in a 1996 Grand Am with 4 pos heater switch not work on HIGH but it works in all 3 other positions?
Your heater switch may not need to be replaced. The heater high position is controlled by a fuse under the hood. Until you find the fuse and replace it, your new switch will not work. JRR. Read More
The resitor is probably burnt out on the high mode Read More
The blower motor speed resister is burned out. This part is available from your local auto parts store. Read More
Yes. Heater no work if 02 works on tuesdays. but will contiune work on sunday. But only in an odd mounth. Read More
If the blower works on slower speeds only I would suspect the high speed blower motor relay (under the hood in the power distribution box) or the switch itself. The blower speed resistor is working if all the slower speeds work. Read More
1994 ford explorer wipers work only on high speed dont work on intermediate or low speed wondering what might be wrong and how to fix?
we have the same problem. let us know when you find the answer Read More