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99% of the time it is the heater resistor block, it is a bunch of resistors which gives you the different speeds. this is mounted close to the heater motor, pass side of the car. Usual cause of failure: water or snow inside the heater housing.
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∙ 17y ago
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Why does your Heater fan only blow on high speed?
Switch problem? Cables disconnected?
Is there relay switch for heater fan?
Yes there is, but it only operates the high speed function.
2001 echo heater fan only has high speed is it the motor or switch?
It is the resistor, replace it.
Why does my heater fan only work on a high speed and how do I fix it?
try replacing the blower motor resistor
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.
Why does the heater fan only work on high on a 2001 safari?
Check the low speed relay and the resistor at the motor
Replaced heater fan multi speed in 1992 Olds 88 When turn car off the fan still runs Is it not hooked up properly. I replaced the heater fan itself.?
now when you say replaced heater fan multi speed are talking the fan or the switch because ther is a fan speed resitor that can go bad and fan only works on high speed which can cause conector to get very hot and cause insolation on the wires to melt and cause a short in the harness making fan run constantly.
Why would a 1997 Mustang have only medium and high speed on the heater fan?
Check the resistor pack on the evaporator case under the hood
Why does the AC-Heater blower fan motor on your 2004 dodge stratus only work on high speed?
The blower motor resistor pack is bad.
What are the symptoms of a heater blower resistor gone bad in a 2000 dodge ram van?
Blower fan inoperative or only works on high speed.
You changed the control resistor and you still dont have a speed 5 on the heater fan you checked the fuse for the Fan and it is good. Is there another fuse for the High speed 5 setting 2001 Grand Am?
I believe you have a relay that runs the high speed for the heater fan motor. The relay should be located in the power distribution box under the hood.
Why does Heater fan not work on high speed?
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,
