Volvo RWD 900 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 6/2002 900 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Low Heat Output 945T 900 1992

posted by  BrickDad on  Fri Nov 15 11:03 CST 2019
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 24 10:17 CST 2014
[RELATED]

Temperatures have dropped in VA this week and I find that I'm getting no where near the amount of heat from the heater/defroster as compared to before. Coolant level is between low and high, temperature gage reads in the center after warmup (when it is intermittently working) and car drives normally. I replaced the head gasket about 70K miles ago. Fan works normally and I can get air flow from vents as selected (floor, defrost, direct etc.)

I suspect the heater control valve and have a spare on hand. I plan to replace it this weekend. Is there anything else I should check?







  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Low Heat Output 945T 900 1992

    posted by  jwalker on  Fri Nov 15 15:04 CST 2019
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Jun 6 08:39 CST 2014
    [RELATED]

    Clogged heater core?
    --
    Will I buy another Volvo??? We'll see....








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Low Heat Output 945T 900 1992

      posted by  BrickDad on  Fri Nov 15 15:10 CST 2019
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Fri Oct 24 10:17 CST 2014
      [RELATED]

      Good point, I will try to flush the core out when I check out the heater valve.







      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Low Heat Output 945T 900 1992

        posted by  aleekat on  Sat Nov 16 13:55 CST 2019
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Fri Oct 24 13:19 CST 2014
        [RELATED]

        If you can let it sit overnight. I've used this method countless times works well. Flush and back flush. Then pour some white vinegar into the core. Let it sit overnight. Then flush again. To save some time trying to get all the air out. Pour antifreeze into the core before you put the hoses back on.
        --
        Post Back. That's whats makes this forum work.








        •   REPLY TO THIS MESSAGE    PRINT   SAVE 

          Low Heat Output 945T 900 1992

          posted by  BrickDad on  Mon Nov 18 05:06 CST 2019
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
          last visit: Fri Oct 24 10:17 CST 2014
          [RELATED]

          Well I lucked out. The old heater valve was pretty gunked up. Replacing it with a new one from IPD did the trick. Back to volcano heat output.

          The first job I did on the car when I got it about 10 years ago was to replace the heater core so luckily that didn't seem to be the issue this time.

          Thanks for the tips.

          Brian Mee

          Manassas VA








          •   REPLY TO THIS MESSAGE    PRINT   SAVE 

            Low Heat Output 945T 900 1992

            posted by  spook on  Wed Nov 20 06:52 CST 2019
            Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
            last visit: Fri Oct 24 08:06 CST 2014
            [RELATED]

            Dear BrickDad,

            Hope you're well. Glad to hear that the heater core was not the problem. Was the "gunked-up" heater control valve installed when you replaced the heater core? Or, was the failed heater control valve the factory-original item?

            Yours faithfully,

            Spook







<< < > >>



©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.