Quick summary (89’ 535iM):
- blowing hot air on both sides no matter what the settings
- replace heater valve assembly still blowing hot
- thus culprit most likely the IHKR 1 (pictured in first image).
- an area on the PC board looks like it’s been subjected to high temps (the second image); two resistors (120R 5%) in this region look rather cooked (quite brown) as well as the back of the board.
- Question: should i try to re-solder these two resistors? BTW – solders look good under hand lens magnification. Checked with a local stealership and the replacement unit is $1,200.00 (Canadian Pesos)…… freakin’ ouch!
Thanks a million in advance!! Cheers!!