fan won't work on high

[benualson]

My blower fan won't work when it is on the highest setting, it will work on the 3 lower settings though. I am thinking about maybe trying to replace the blower motor resistor, any thoughts?

 

[Snotrocket]

If your resistor was bad it would only work on high and not the other 3 settings. I would almost think it's the switch itself.

 

[Half Assed]

pull the resistor out and check it

 

[1997chevydriver]

There is a high speed fan relay behind the glovebox, check that. If that dont work then its the switch

 

[TruckinAin4Sissies]

Mine works... If I wiggle the switch enough.




-Truckin'-

 

[dkh_524]

mine kinda does the same thing. it will work for awhile and then stop and then start working again doesn't matter what setting it is. i replaced my switch and that didn't do anything for me. my be its my resistor. i got quot from a Chevy dealer don't think it was that much from what i can remember think like 10 bucks, but one of the mechanics had one laying around and he gave it to me.

 

[jmc1997ck]

Had a similar issue with the second to highest speed and the ventilation would toggle from floor, defrost, vent on its own to whatever position it deemed important. New control unit solved all problems...

 

[trailer-trash]

I replaced 4 of the switches that kept getting burnt..they had warranty at the Zone so who cares? well I finally got tired of replacing them and pulled the resistor. It had obviously gotten hot at some point....and apparently was burning the variable switch out. My advice-replace both at the same time..will cost about $40 and less than an hour of your time. Headache solved.

 

[benualson]

I replaced the blower motor resistor and the relay. Still doesn't work on High. So, you are saying I need to replace the switch (when you say switch, you are referring to the device that controls temp blend, fan speed, air directing & temp correct?)

 

[bluex]

I replaced the blower motor resistor and the relay. Still doesn't work on High. So, you are saying I need to replace the switch (when you say switch, you are referring to the device that controls temp blend, fan speed, air directing & temp correct?)

You can replace just the speed switch on the controls. You don't have to replace the entire unit but you will have to pull it out of the dash to replace the speed switch....