2001 S60 Cabin Fan Irregularity

revfred98 · Post by **revfred98** » 27 Aug 2014, 07:48

I now have a used 2001 S60. The cabin fan speed is irregular. That is, it runs fast, drops to slow, then faster, sometimes staying constant, but up and down is the rule. All this while in one position. Also, three or four times, I have returned to my parked car to find the fan running, while the car is off, of course. if I turn the key to position one, and set speed control to off, it will stop. Is this a relay? Thanks, and happy driving.

Post by **regent** » 27 Aug 2014, 08:11

On teenage cars like yours and mine, irregular blower speed may be due to one of these:
1. A 'dirty' control potentiometer in the CCM (less likely), or
2. A worn blower motor bearing (replace blower). This may or not be accompanied by random bearing noises.

The blower 'running on its own with the car off' is not a concern; this is actually a climate control feature that prevents residual moisture from accumulating inside the HVAC evap unit.

revfred98 · Post by **revfred98** » 27 Aug 2014, 11:03

Super! Thanks for the informative reply. I'll ask my Volvo guy to check out the blower motor. And that's a relief about the residual moisture thing. That could have been a weird one. Thanks again.
Rev
1987 240 DL Wagon....Wrecked
1993 240 DL Wagon.....Daughter's car
1998 V70 Wagon....... Blown piston at 348K
2001 S60.................My everyday car
2009 V70 Wagon 6 cyl....Wife's car

Tonyx · Post by **Tonyx** » 02 Sep 2014, 07:18

I had similar issue withe erratic climate control fan speed. Turned out it was the electronic resistor that went bad. This unit is on the blower assembly and is metallic with heatsink. Lowest cost was from amazon.com.