Why does my A/C keep coming on>???
Thread Starter
Racer
Joined: Apr 2007
Posts: 307
Likes: 0
From: Warrington Pennsylvania
Why does my A/C keep coming on>???
So I havent started my car in about a month annd a half or so and after about 10 seconds, the A/C comes on. ISo I hit the off button and in about 20 more seconds, the A/C comes right back on again. I dont understand, as this keeps happening. It stinks because i have a very large cam and idling when its cold is difficult enough, and whne you throw the A/C on top of it, its bad. Anyone experience this issue. Thanks guys....!!!
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
NightmareZ06
Been there had that problem!
Try this:
Take a look at what "MODE" you have selected. If it is in Defrost mode, or Defrost bi level, the AC will automatically come on. If it is below 32 degrees, the compressor will be locked out and wont come on even if you select the defrost modes. Take a look at that and change the mode selection to prevent it from happening.
If the memory setting is set on that mode, you will have to change the setting each time you start it. Change the mode, press your memory to remember a different setting.
BC
Been there had that problem! Try this:Take a look at what "MODE" you have selected. If it is in Defrost mode, or Defrost bi level, the AC will automatically come on. If it is below 32 degrees, the compressor will be locked out and wont come on even if you select the defrost modes. Take a look at that and change the mode selection to prevent it from happening.
If the memory setting is set on that mode, you will have to change the setting each time you start it. Change the mode, press your memory to remember a different setting.
BC
! Thanks for reply Bill!!!
Burning Brakes
Joined: Aug 2006
Posts: 1,217
Likes: 5
From: Stark County Ohio
I’ll go out on a limb here and say that most people don’t know that the air conditioning engages on virtually all modern day cars when the climate control is in any aspect of defrost mode. (Defrost, Bi-Level, Blend, etc.)
your probably right. I just didnt realize that the memory contols the climate control as well!!
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Something you probably didnt realize is the HVAC system will default to that mode if the battery is low and you try to start the car or has been removed. So,,if it keeps reverting back to that mode, you could have a low charged or even a bad battery.
If it was sitting for a while, the battery could have been low. You might want to have it checked out by load testing it.
BC
If it was sitting for a while, the battery could have been low. You might want to have it checked out by load testing it.
BC
