Thread: Ac problem works at idle not driving

Originally Posted by RexReid

I'm sorry to hear that. I hope your situation improves.

^X2 I hope the surgery fixes it and you're able to go back to work.

Well here's my 2 cents. The a/c has to build pressure in order to work. Does your high side line get hot? Does it freeze over and get frost on it? When cruising down the road you are changing two things... The amount of air flow across the condenser, and the rate at which your compressor in spinning ... But you said it stays cool when reving to 2k rpm so the only thing changing is the air flow. Your fan could be stuck. Pulling more air across the condenser and not letting the high side pressure rise. That combined with the wind while moving could keep your pressures too low to cool..

Originally Posted by 5pointSlo

Well here's my 2 cents. The a/c has to build pressure in order to work. Does your high side line get hot? Does it freeze over and get frost on it? When cruising down the road you are changing two things... The amount of air flow across the condenser, and the rate at which your compressor in spinning ... But you said it stays cool when reving to 2k rpm so the only thing changing is the air flow. Your fan could be stuck. Pulling more air across the condenser and not letting the high side pressure rise. That combined with the wind while moving could keep your pressures too low to cool..

For being a little "slow" it sounds like you know a little bit....must have taken a long time. Lol

Originally Posted by streakerok

That's the weird part. I ran it up to 2000rpm and held it there for five minutes. It kept blowing cold. It has something to do with driving down the road. I just can't figure it out. Sent from my SPH-L710 using Tapatalk

Sounds like a faulty sensor ( high/low pressure ) or orffice is plugged up. You can bypass them and drive to see if that eliminates them from the problem.

2007 F150 XLT FX2 SPORT - 5.4l 3V 3.73 LIMITED SLIP EDGE/EVOLUTION PROGRAMMER

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Also could be dirty evap thats freezing up?

2007 F150 XLT FX2 SPORT - 5.4l 3V 3.73 LIMITED SLIP EDGE/EVOLUTION PROGRAMMER

Thanks 5pointslo and lee Reece. I will check that out .

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Originally Posted by RexReid

For being a little "slow" it sounds like you know a little bit....must have taken a long time. Lol

Haha. I are a little smart with some stuff.

Lol

Originally Posted by 5pointSlo

Haha. I are a little smart with some stuff.

A little.

Did you ever get this fixed?

Nope still have figured it out. Now it only blowing hot all the time out the defrost and floor. I think its in the control. Not sure.

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