Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 1/2023 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

1990 760 A/C controls 700

posted by  soundman2033 on  Fri May 25 05:15 CST 2012
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Aug 13 06:59 CST 2014
[RELATED]

I have a 1990 760T with the "ECC" electronic climate controls, and it is showing 121 code ground to short, I understand that, but any suggestion on where to start would be great. Also the A/C is working great, just keeps flashing, only thing I have noticed is the electric fan will not come on, I have replaced the relay ,but it never turns the fan on, if you supply power the fan runs fine. Again any help would be appreciated.








  •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

    1990 760 A/C controls 700

    uid 18083's pic
    posted by  lucid on  Fri May 25 08:03 CST 2012
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 12:31 CST 2014
    [RELATED]

    The 1-2-1 "Short to Ground" code points to the Cabin Temp Sensor, located in the ceiling with the dome light. That's all I know about ECC, having the book but no experience.

    Well, I do know one more thing: In these ECC and MCC systems, the Fan does NOT run automatically when the ACC is ON. It's controlled by many factors, as seen by AC system pressure sensors and engine temperature. I haven't heard my '93 940 MCC system fan run with AC on in years, except with prolonged idling in hot weather.

    --
    Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








  •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

    1990 760 A/C controls 700

    posted by  Andrew in AL on  Fri May 25 06:37 CST 2012
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 06:17 CST 2014
    [RELATED]

    Not sure, but it sounds like you are not sure about the fan.

    It has to work, and it should come on when the air is on.

    Is it coming on when it gets good and warm in traffic? That is the main thing.

    Hopefully someone with more expertise in the electrical will chime in, and this bump will help.

    I wish you well.
    --
    "Do you think that's air you're breathing now'? (The Matrix 1999) '89 764 (retired), '94 940T (319K), 92 245 (207K)







<< < > >>



©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.