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Impala Dead Ventilation system
10-13-2012, 04:47 PM
Post: #1
Impala Dead Ventilation system
I have a 2002 Chevy Impala LS, Automatic, 3800 V6, 110k miles. I am in Southern California.

My ventilation system just quit working. The fan doesn't blow in any setting. The A/C light won't come on. The light for the Recirculating setting is on and won't switch to the Fresh Air setting.

This just happened. I thought over the last few days it was a little flakey; I would hit the A/C button and the light didn't come on and I'd hit it again a time or two and the light came on, but I wondered if sun glare was just preventing me from seeing the light. But now it is just dead.

I hope this is fairly minor but I'm not sure what would cause this. Any help would be appreciated.
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10-14-2012, 07:10 PM
Post: #2
RE: Impala Dead Ventilation system
what i would try and do is locate your blower motor under the hood of your car and detach the power wires from the blower motor. Next run a positive and negative wires from the battery to the connection for the blower motor. If the blower motor works than that will atleast let you know it works .... most likely it is either a fuse gone bad or a relay that went out
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10-15-2012, 12:49 AM
Post: #3
RE: Impala Dead Ventilation system
(10-14-2012 07:10 PM)sandman Wrote:  what i would try and do is locate your blower motor under the hood of your car and detach the power wires from the blower motor. Next run a positive and negative wires from the battery to the connection for the blower motor. If the blower motor works than that will atleast let you know it works .... most likely it is either a fuse gone bad or a relay that went out

Thx. The blower motor works. The problem is intermittent. Sometimes things work, sometimes not. Probably a loose or bad connection in the wiring.
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10-16-2012, 12:10 AM
Post: #4
RE: Impala Dead Ventilation system
Just a suggestion (because I have seen it on other GM products) but try pulling out that control panel where the switches are, then disconnect the plugs and inspect the terminals. I have seen a few that have melted the plug for one of the hot wires. For the units I have seen (Astro vans) GM sells both the replacement control and a pig-tail wiring harness repair kit. The new one has heavier wires and better connectors. The harness kit also comes with crimp connectors so you have everything you need.
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10-16-2012, 02:01 AM
Post: #5
RE: Impala Dead Ventilation system
(10-16-2012 12:10 AM)Rupe Wrote:  Just a suggestion (because I have seen it on other GM products) but try pulling out that control panel where the switches are, then disconnect the plugs and inspect the terminals. I have seen a few that have melted the plug for one of the hot wires. For the units I have seen (Astro vans) GM sells both the replacement control and a pig-tail wiring harness repair kit. The new one has heavier wires and better connectors. The harness kit also comes with crimp connectors so you have everything you need.
Thx. For now it is working, but if it fails again I will try that. I think it's a bad connection somewhere, not a bad resistor, motor, or relay. It's worked fine since I unplugged and reinserted the blower connection, so maybe that was the problem. Time will tell.
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10-16-2012, 10:27 AM
Post: #6
RE: Impala Dead Ventilation system
Quite often that's a sign of the blower itself failing. Fooling with the plug just jiggles the brushes and buys you a bit of time. Remember, these newer cars have the blower running constantly on low speed so they do wear out.
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