Air conditioning

Tiny
SMHOLSTEIN
  • MEMBER
  • 1998 DODGE CARAVAN
  • 6 CYL
  • 130,000 MILES
Why does my car over heat when I turn on my air conditioning?
Monday, May 16th, 2011 AT 1:36 AM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Is the radiator fan turning on?
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Monday, May 16th, 2011 AT 7:53 AM
Tiny
SMHOLSTEIN
  • MEMBER
  • 2 POSTS
No neither fan is running.
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Thursday, May 19th, 2011 AT 10:22 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
The best way to approach this is to use the Chrysler DRB3 scanner to access the Engine Computer which controls the radiator fan relay. That will give you the option to turn it on to see if it works.

Without the scanner you are somewhat limited to "throwing random parts" at it, which we really hate doing. In this case, however, that relay is an electronic computer module, and we all know how extremely unreliable computers are in cars. The module sits about half way down on the driver's side of the radiator. It must be bolted solidly to the sheet metal, otherwise it can get hot enough to burn your hand. It's a fairly high-failure item and a good suspect when the fan doesn't run.

Sorry for taking so long to reply. The site stopped working on my regular computer. Just want you to know I'm not ignoring you.
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Friday, May 20th, 2011 AT 6:10 AM

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