The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

What does these pressure and fan changes tell me about AC system? 900 1994

posted by  Philip on  Fri Aug 28 08:28 CST 2009
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 10:21 CST 2014
[RELATED]

I put in a rebuilt compressor, dryer and oriface. The AC works OK but not at cold as the original compressor. At idle or stop lights, it is especially lukewarm.

At idle and 90 degrees outside, the radiator cooling fan starts when the low side pressure rises to 45. It stays on for 4 seconds and then the fan stops and the pressure starts to drop. When the pressure drops to 38, the pressure then starts to rise again. In about 10 seconds, the pressure is back up to 45 and the fan kicks on. This cycle then continues on and on.

In comparison, when my other 940T is at idle, the fan comes on and stays on. The pressure stays at 33 without any change. And the air is nice and cold.

Is this a compressor problem, freon problem, or fan problem, or sensor problem?
(when I vacuumed and put r134 in the system, I put in 3 (12 oz.) cans, and the system calls for 30 oz so there should be plenty of r134)

Thanks for any ideas.






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.