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You need to change the blower motor resistor, it cuts the power down from 12 volts
to lesser volts, so you get 1,2,3,4,5 levels of heat. When the resistor goes out, it only
puts out 12 volts, so only high works. It's about a 30 dollar part, and you usually have to remove the glove box, pretty easy really.
What else can I help you with?
Why does heat fan on Toyota Solara only work on high?
You most likely have a bad blower motor resister.......
Why does the heater on a 2003 Chevrolet Tracker only work on high speed?
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.
What might cause the heater and air conditioner on a 1999 Mercury Cougar to cease functioning?
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?
Why does my 2004 trailblazer ac fan only work on high?
The 2004 Chevrolet trailblazer air conditioning fan switch has three settings. The switch can malfunction, and only work in the high setting.
If my cab heat and ac fan only works on high setting is it bad relays resistors or motor?
AnswerI think it is the switch or the wires. Actually it would most likely be the resistor motor is shot, if the blower motor only blow on high there is no resistance thus it will only work on high.
Why does the fan work only on high and keep blowing resistors on low?
Had one that the fan motor was going bad Was burning out resistors with high draw
Why does your fan only work on high in a 2006 Chrysler Sebring?
blower motor resistor
Why does your fan only work on high?
the blower motor resistor is bad or the connector going to it
Why does heater fan only work on high 98 ford expidition?
The fan control module in the engine compartment has gone bad.
Why does 2003 Avalanche fan work on everything except high Resistor or Relay?
If only high speed is effected check the high speed relay and/or the fan switch/electrical connections for problems.
Why does your car fan only work on high?
the blower motor resistor is bad or the connector going to it
Air conditioner only works on high fan speed why?
Unless it is a high efficiency model 14 SEER or greater, it is only supposed to run on high speed in a/c mode and low speed in heat.
