A/C has mind of its own
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 106
Likes: 4
From: Chula Vista, CA
A/C has mind of its own
This has been going on for a while but is progressively getting worse. My A/C turns on and off all by itself! I mean, with the switch at 12 O'clock, in the off position, the A/C will randomly start blowing. If my fan switch is on #4, the A/C will blow at max speed. Conversely, the A/C will just randomly turn off when I have it on. Anyone ever hear of this issue? I used the search feature but didn't find this same issue...
Is it the fan motor that comes on .. or the actual A/C light comes on by it self.. there is a known issue with the blower motor .. fixed by replacing the blower motor resistor...
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 106
Likes: 4
From: Chula Vista, CA
It's both. I'll research the known issue to see if that's what is going on with my truck. Thank you
EDIT: I had the issue with the motor only blowing in high speed several years ago and replaced the resistor behind the glove box. This issue is completely different in that *when the blower is working, I have full control of the speed. If I happen to leave the blower in high speed but the A/C switched to "off", the A/C (and blower) will sometimes kick on by itself and will be in high speed. I can adjust the speed up and down, but can't always turn it off. It's very random, but increasingly common.
EDIT: I had the issue with the motor only blowing in high speed several years ago and replaced the resistor behind the glove box. This issue is completely different in that *when the blower is working, I have full control of the speed. If I happen to leave the blower in high speed but the A/C switched to "off", the A/C (and blower) will sometimes kick on by itself and will be in high speed. I can adjust the speed up and down, but can't always turn it off. It's very random, but increasingly common.
Last edited by g8rfan; Apr 10, 2018 at 09:32 AM.
