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My ac sucks :(

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Old Jun 22, 2010 | 01:52 AM
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From: fl.
Default My ac sucks :(

Need some help, My ac started acting up again. The small lights start to turn off and on. It will go from ac mode to heater to defrost in the back. I have sometimes shut it off and it has even turned back on by its self. Is this a bad ground or something?
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Old Jun 22, 2010 | 11:00 AM
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From: Anthony TX
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What HEAT MODE?? Do you mean it coes from cooling to heat by its self?

The only way it can change modes is by your fingers on the buttons or the head unit is bad.
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Old Jun 23, 2010 | 12:36 AM
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From: fl.
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Sorry yes thats what i meant. I'll have it set at lets say 60 and will by itself start goin up to like 88 it will turn off the ac and just blow regular warm air at times it changes where the air is going to go like to my feet or the front window. It looks like if there someone just pushing all the buttons on the ac controls.
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Old Jun 23, 2010 | 01:04 PM
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From: Gardner KS
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Originally Posted by 976booboo
Sorry yes thats what i meant. I'll have it set at lets say 60 and will by itself start goin up to like 88 it will turn off the ac and just blow regular warm air at times it changes where the air is going to go like to my feet or the front window. It looks like if there someone just pushing all the buttons on the ac controls.
Are the climate control buttons showing these changes as well? When it does a self-test it will sweep from cold to hot (Blend door) which may explain why it goes up to 88 (unless your display is actually showing 88) Sounds like a possible bad ground. Check the frame rail grounds from the engine bay... two of them, I believe, one on each side near the pneumatic arms for the hood. They are small black boxes bolted to the frame (with a bunch of black wires running into them)

I had weird electrical problems which all resolved after getting rid of it... using a single post in the frame.. I put ends on all the wires and attached them directly to the post.
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