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More than likely the blower resistor is bad....I recently ran into this problem in my 91 Vette...Hope this helps!

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โˆ™ 2006-05-11 12:37:53
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Q: How do you fix No low and medium blower speed when high speed blower works fine on a 1987 Corvette?
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Related questions

What is wrong when the heater AC blower motor only works on one speed - Ford Explorer?

The blower motor works on only one speed. The blower motor resitor pack is defective and needs to be replaced. It is located on the blower housing in the engine compartment just below the blower motor.

I have a 2004 Chevy Colorado blower motor only works on high speed only?

Probably your blower motor speed resister is burned out.

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If the one speed it works on is high speed, it is the blower motor speed resisitor that is bad.

My 2004 Jeep Grand Cherokee AC only works on high does anybody know why the AC won't work on low or medium?

Assuming that by "high," "low," and "medium" you are referring to HVAC blower fan speed and that this happens with heat as well as with AC: Replace the blower resistor. It's no good.

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Heater only works on high?

The blower motor speed resistor is burned out.

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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.

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The blower motor speed resistor is burned out.

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More than likely the blower motor speed resistor is burned out.

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Resistor on the heater blower motor has failed

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It's the blower resistor, it's a common problem in Xterras and it's easy to replace....

The blower motor on your 1990 ford aerostar seems like it only works when it is on max ac how can you get it to work on the other selectionsshould you replace the blower motor or is there a wayto test?

If you are saying that the blower motor only works on the high speed setting, then the Blower Motor Resistor is defective and needs replacing.

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Blower fan inoperative or only works on high speed.

I replaced blower motor on 2002 Pontiac grand prix was'NT working at all now only works on high speed?

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The blower resistor has failed.The blower resistor has failed.

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You most likely have a bad blower resister..........

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That would be caused by the blower resistor.

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