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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

wimpy AC 700

posted by  Will740turbo on  Wed May 13 11:35 CST 2009
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

90 740Tic (just rolled over 280000 :D )

My AC is pretty wimpy. It seems like it can't cool the heat sink (term?) that cools the incoming air fast enough. It will get very cold, but once I've had the fan on high for a while (this is at highway speeds), the incoming air warms up. If I turn it to low speed for a minute, when I turn it back to high, the air is nice and icy....for a few minutes. Then it's basically just cool air.

Seems to me like it's a bit low on refrigerant >.<
at 280,000 miles, it makes sense.

I'm the car's fourth owner, it may have been switched to R134a - is there a way to tell?
Is it completely necessary to convert over to R134a if I want to add more refrigerant? It seems to work about 60%. If I add Ester Oil and R134a, do I really need to remove the old oil and refrigerant? I repeatedly saw "PEG oil" or something that will interact with mineral oil and wreak havoc..... but is there one or the other necessarily present already?

Can someone clarify for me? I've recharged two other cars' AC and it was ridiculously easy.

Thanks,
Will
--
1990 740 Turbo, on its way to stock specs, maybe beyond






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.