Volvo RWD 900 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 4/2004 900 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

hissing sound coming from the AC 900

posted by  Peter Penguin on  Wed Jan 11 11:07 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Oct 13 08:59 CST 2014
[RELATED]

Seeing as how it's January, I haven't been using the air conditioning much for the last 5 months... and even in the summer I rarely use it.

But today, I noticed a hissing sound coming from the AC tank near the turbo after turning off the engine.

After hearing this, I turned the engine back on and ran the the AC just to see if it would make any difference, and it did. The hissing was a good deal less pronounced then.

Any idea what's going on? Anything serious to worry about?

Thanks for any input....


1995 940 Turbo








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    hissing sound coming from the AC 900

    posted by  someone claiming to be sredwine on  Wed Jan 11 17:16 CST 2006 [RELATED]

    Peter,if you are using your defog setting on the climate control,you are running the AC system-this dries the air for faster defog-some hissing from the receiver dryer is normal after shutting off engine IF compressor has been on.Try driving car without using defog-should not be any hissing from this area.Of course,you could be hearing a vacuum leak-but these generally aren't very loud.
    sredwine 94 940T has 168K,'98 V90 at 105K








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    hissing sound coming from the AC 900

    posted by  Steve on  Wed Jan 11 11:14 CST 2006
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 07:16 CST 2014
    [RELATED]

    AC tank? You mean the receiver-dryer, the large aluminum tube? This could be hissing from the expansion valve, which is mounted in the firewall, or it could be a leak. the only way to tell is to take it to a shop and have them look for a leak. Fix the leak now or you'll be buying a new recceiver dryer.
    --
    See the 700/900 FAQ under 'Select Link' button on the top right.







<< < > >>



©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.