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Discussion Starter #1
Ok, I have a Ac unit that has gone out. I have changed the selector switch, since it would not cycle from off to high, still want work. I have swapped the relays under the good, nothing has changed. How can I test that the blower fan is working and maybe someone can tell me how to change out the controller unit, I havent seen anything here that explains that. The I can get back to replacing my compressor, dryer and hoses that is going out.
 

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You mean the blower motor ain't coming on? Might be a fried blower motor, or the blower fuse block....danget, I can't remember what it's called..but it burns off the extra energy to the blower to change the blower speeds.

Blower is simple, one lead for power, one lead for ground, just go from your battery, and plug a wire from the battery into the blower, if it turns on, it works.
 

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97 Chevy; Are you saying you only have high speed on your blower fan? If so, you probably need a new blower resistor.
 

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There is a fan speed resistor in the air box. I think on your truck you access it by taking the glove box out & you can see it in the air box housing (couple screws & it's out,) BUT, I'm not saying replace it unless your fan symptoms are as I asked you about in my post above.
 

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mine wont work on high, everything works except for that, i replaced the fan relay, fan resistor and the fan switch, i'm out of options...any suggestions on what it could be?

Thank you...
 

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Discussion Starter #7
Ok I replaced the selector switch on the control panel. Im working now all speeds. Part less than $20.00 at Autozone.
 
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