ecc / fan acting weird Topic is solved

Post by **Clemens** » 23 Sep 2017, 03:50

So in my wife's car the fan and heater work strange. All of the sudden.
Worked well the other day, today nothing. No warm air, no fan motion no matter where i set the fan control to. Then after stating the car new. The fan would blow on full blast and could not be turned off. Still mo warm air, just cool air from oitside at full blast. Rec and AC light would not illuminate. Turned the engine off. After new start no fan again. Still no light at rec or AC.

My guess is a shot ECC unit. Any other suggestions?

Post by **abscate** » 23 Sep 2017, 05:29

It certainly points to multiple logic faults with the ECC control unit being the common element.

For reference, FCP reports the 1993-1997 use the same unit

OE NUMBERS
9166550, 9134770, 9134820, 9144256, 550

The 1998 uses a unique model year unit

And the " bastards" 1999-2000 use a third unit

Junkyard and eBay are probably cost effective sources

Post by **wizechatmgr** » 23 Sep 2017, 05:36

I know I received my "bastards" one from eBay. Guy was selling like 100 of them @ $50 a pop. Worked fine.

Post by **Clemens** » 23 Sep 2017, 07:08

Thanks! I hope our local member roorback has one in stock, otjwewise I will have to visit our local volvo junkyard

Post by **Clemens** » 24 Sep 2017, 05:44

Just swapped my properly working ecc out of my 96 into the 95 and suddenly the heat andnfan are back. Just waiting for the replacement unit. Nice if a problem is easy to solve.