ac compressor on/off too soon

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Jul 12, 2005 | 01:17 PM

Booner

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Driver School Candidate

Joined: May 2004

Posts: 13

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From: NC

ac compressor on/off too soon

Been having problems with ac on my 95 es300 for 2 years. On very hot days, it does not blow cold air at all. On warmer/cooler days, it will blow cool air for a few minutes. Tried to find leak with dye but can't see no leak. Everytime i fill up refridgerant the compressor kicks on and off too soon and the air inside is not cold at all. When compressor is on I do hear hissing sound near the lower pressure side port. Can someone help me find what the problem is?

Jul 12, 2005 | 02:45 PM

CUMan

Lead Lap

Joined: Apr 2004

Posts: 414

Likes: 4

From: Alabama

Sounds like your expansion valve is sticking. This is a very common problem on mid-90's ES models.

Do a search. This problem has been discussed numerous times.

Jul 12, 2005 | 03:53 PM

VVT-i

Lexus Champion

Joined: May 2002

Posts: 2,781

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From: Georgia

You may overfilled you A/C system. Do you have A/C gauge when you filled up the freon?

Jul 12, 2005 | 07:21 PM

koolaidman

Lexus Test Driver

Joined: Jul 2005

Posts: 1,015

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From: il

Quote:

Originally Posted by Booner

sounds like its over filled...try to find an ac pressure gauge and tell me static pressure

Jul 13, 2005 | 12:19 PM

Booner

Thread Starter

Driver School Candidate

Joined: May 2004

Posts: 13

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From: NC

Yes I have the psi gauge. Do you read it when the compressor kicks on and the can is shut? I had the valve opened all the way to release the coolant, psi was like 35-45 while releasing, then compressor immediately turn off/on in short intervals, I left the valve fully opened for awhile, but the can has pretty much the same amount of coolant left.