1997 850 GLT - Dual climate passenger side fail

bjmcc1984 · Post by **bjmcc1984** » 03 Dec 2013, 19:59

Does anyone know why my passenger side temperature dial no longer changes the passenger side from hot to cool?

Occasionally, it will "reset" after a few drive cycles but it doesn't seem to be happening at any specific point.

Thanks

Post by **cn90** » 03 Dec 2013, 20:10

Do you have ECC (Electronic Control Climate)?
If so, then search forum for "damper motor".

bjmcc1984 · Post by **bjmcc1984** » 03 Dec 2013, 21:05

I'm not sure if I do but that sounds like a likely culprit

Thanks

Post by **jreed** » 04 Dec 2013, 04:44

I did a short write up on how to diagnose, remove and clean up a damper motor. You could also just remove and replace a bad damper with a new/used one. Cleaning up the old damper and reinstalling it fixed my problem with lack of temperature control in the ECC on my '97 855 GLT:

https://www.matthewsvolvosite.com/forums ... =1&t=50525