AC question
Limping across the line
Joined: Oct 2002
Posts: 5,299
Likes: 109
From: Peoria Az
Could be a couple of things
1. Low on charge. Engine speed drops at idle thus compressor slows and pressure drops causing compressor to disengage.
2. Cooling fans have crapped out. Once you start moving you get airflow across the condensor and the system starts working.
Reason inadequate airflow causes the compressor to stop is because the Hi side pressure increases to the limit switch trip point which cuts power to the compressor clutch.
Oversimplified
1. Low on charge. Engine speed drops at idle thus compressor slows and pressure drops causing compressor to disengage.
2. Cooling fans have crapped out. Once you start moving you get airflow across the condensor and the system starts working.
Reason inadequate airflow causes the compressor to stop is because the Hi side pressure increases to the limit switch trip point which cuts power to the compressor clutch.
Oversimplified
Thread Starter
Racer
Joined: Jun 2005
Posts: 289
Likes: 10
Ac
Here's a kicker, I just pulled and cleaned the fuses and relay for the ac blowing cold at idle now..???? Will give it a couple of days to see what happens next. The for all the advice for now...lol the fan is working fine
Last edited by jazzmk1; Jul 15, 2016 at 09:06 PM. Reason: Additional text
Melting Slicks
Joined: Feb 2016
Posts: 2,984
Likes: 380
From: Edmond Oklahoma
engine was probably getting hot and air con was disengaged.
or it could be that idle speed doesn't generate enough RPMs to get a lot of cool air.
you didn't mention if the air works when your're moving and maintains a cool temp.
or it could be that idle speed doesn't generate enough RPMs to get a lot of cool air.
you didn't mention if the air works when your're moving and maintains a cool temp.
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