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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Thank you Brickboard FAQ 900

posted by  spook on  Wed Jun 24 21:44 CST 2015
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 24 08:06 CST 2014
[RELATED]

Dear PA24 driver,

Hope you're well. Here's the link to the FAQ section dealing with the control board, in the climate control unit: https://www.brickboard.com/FAQ/700-900/HeatingAirConditioning.htm#MCCClimateControlACNotWorking .

You're correct. The circuit board in the climate control unit is behind the front panel, on which are the three knobs that control: fan speed, air flow direction, and temperature.

The solder joints develop micro-cracks - too small to be seen with the unaided eye - as a result of repeated on-off cycles (heating and cooling). Eventually, the solder fatigues, and cracks.

To avoid missing a micro-crack, touch the tip of a soldering iron (not more than 40 watts; 25 watts is ideal) to each joint where the relay's pins go through the board, and on the main connector. If I recall correctly, there are 13 pins on the main connector.

When the solder changes color - from dull gray to shiny silver - the solder has liquefied. That closes any micro-cracks.

Hope this helps.

Yours faithfully,

Spook






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.