ECC fan speed control

nikolaj · Post by **nikolaj** » 03 Nov 2012, 07:50

Dear all,

The ecc fan in my '98 V70 behaves somewhat strangely these days. I always drive with the fan in "auto". Sometimes (every other or third drive) the fan will intermittently go to max speed for a second or two - much like when the temp setting is changed - except I do not change the temp setting. Other times the auto function of the fan does not work at all and the fan will stay on low regardless of temp setting and engine temp. This is solved by turning off and restarting the car. All of this happens both with A/C on and off. I do not have blinking lights in the ecc control panel.

Any input on how to solve this is appreciated.

Nikolaj

Post by **rspi** » 03 Nov 2012, 12:51

My guess would be the ignition switch.

Post by **jblackburn** » 03 Nov 2012, 13:41

Yeah, mine did this. That thing has a mind of its own sometimes.

Try blowing out the temp sensor next to the defroster switch with a can of compressed air.

nikolaj · Post by **nikolaj** » 04 Nov 2012, 05:23

rspi wrote:My guess would be the ignition switch.

Please excuse my ignorance but how would that be connected? Would I not have a whole army of problems if it was a faulty ignition? I do have a less than optimum battery though, so you definitely have my full attention...

Nikolaj

nikolaj · Post by **nikolaj** » 04 Nov 2012, 05:24

jblackburn wrote:Yeah, mine did this. That thing has a mind of its own sometimes.

Try blowing out the temp sensor next to the defroster switch with a can of compressed air.

Ah yes, the usual suspect! Will do

Thanks for your input

nikolaj · Post by **nikolaj** » 22 Nov 2012, 13:37

Just an update. I replaced the battery as it was very weak. The ECC hasn't acted up since... cannot explain this, but can certainly live with it

Thanks for the suggestions!