Posted: 7/15/2017 1:49:04 PM EDT
Alright gents, right off the cuff, I'm not a car guy. I've had this 2004 Pontiac Grand AM since 2005 and it's been a very dependable car that's given me hardly any fuss even after putting nearly 200,000 miles on it. Well, now that it's hot as shit outside, my AC dies. It was running fine on a errand run and then my wife mentioned that the air seemed to be fading out. Sure enough, the air that was previously blowing forcefully like it always did was barely putting out anything over the span of a few seconds. I turned it off and then turned it back on again only to feel it for a second before it went out again. After that, it wouldn't turn on at all. Did some research, decided to replace the resistor. Bought a package deal that also came with a new blower motor. So here's what I did:
2. Replaced the resistor (different brand) and the motor: again, got nice forceful air, but still only have the same 4 out of 5 settings (1-2-3-4 no 5), turning it to 5 shuts it off completely. Still running, but too early to comment on longevity. 3. Kept the same resistor and motor, replaced the wiring harness since it looked a little crusty: no changes, still have forceful air and only 4 out of 5 settings. Now, I'm completely fine with this so long as it lasts. But does anyone have a guess as to why I lost a setting? Also, should it die again, where else should I look for the issue? The AC control panel itself? Could that also be the reason I lost a setting? Thanks. |
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Quoted:
The high speed works off of a separate relay (not the resistor). Should be a fuse (30 amp I think) and a relay in the fuse box under the hood,so check those. |
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Quoted:
Speeds 1-4 use a different fuse and go through the resistor. Speed 5 has a separate fuse and a relay. Won't hurt a thing to use the other speeds that are working. 
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