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Q: Why does your Heater fan only blow on high speed?
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Heater only works on high speed?

The heater motor speed resister is burned out.


Why would a 96 Taurus wagon heater only blow when running at high RPMs and cool down when idling?

it has a partially clogged heater core.replace the heater core


Heater only works on high?

The blower motor speed resistor is burned out.


What causes an ac-heater in a Nissan Sentra to only blow on high?

you need a new blower motor resistor


Is there relay switch for heater fan?

Yes there is, but it only operates the high speed function.


Why does your heater blower only run on high?

The blower motor speed resistor is burned out.


If 2000 dodge ram heater blower motor has high speed only what is the issue?

If it has only high speed, the blower motor resistor has to be replaced to get all speeds back.


Why does the heater in your 03 dodge ram blow cool air only?

i can turn the blower speed on low and the air gets warm , but not hot . then i can turn it to high and it get even cooler Check your thermostat, it may be stuck.


Why does your heat in your car only blow on high?

Because the resistor between the heater swithch and the heater motor is not functioning. Usually mounted on, in or near the heater enclosure. Its a common repair, and can be done by the do-it-yourselfer.


How will the heater react if the heater core is stopped up?

Your heater will blow cold air only.


2001 echo heater fan only has high speed is it the motor or switch?

It is the resistor, replace it.


You only have high speed on your heater blower what is wrong 2003 mercury sable?

The most likely problem with the heater blower on your 2003 Sable is the blower resister. The resister can go bad and cause you to only have one speed.