Temp control fan always on.

jquick1 · Post by **jquick1** » 30 Apr 2016, 10:11

Fan is always on when car is running , and sometime it comes on when the car is off with no keys in it. Any clue? 2002 Volvo s60 base Thanks Dwayne

Post by **MadeInJapan** » 30 Apr 2016, 10:38

Are you talking about the fan at the front of the car or in your AC system? If the one in your engine bay that's usually a sign that the engine coolant temperature (ECT) sensor has gone bad. Does the temp of the car (as indicated on your dash) fluctuate? If it does, that's another indication of this issue. The fan starting on its own is suppose to happen but not after the engine has cooled completely.

jquick1 · Post by **jquick1** » 30 Apr 2016, 13:26

Inside fan

Post by **MadeInJapan** » 01 May 2016, 10:47

Ah, okay... LOL. Yes, very strange that it stays on. You sure you don't have auto engaged with thermostat? Hmmm, but it runs even with the key out right? Then there has to be some cross bleeding between positive power wire somewhere... Sorry, I'm not much help. Hopefully someone who knows these units can chime in to help you.

nsjames · Post by **nsjames** » 02 May 2016, 08:09

depends on what always on is.

it does run the fan after shutdown to clear the evaporator so it doesn't get mold and smell bad.
so if it runs and then shuts off, normal.
if it runs until the battery dies, problem.

jquick1 · Post by **jquick1** » 02 May 2016, 08:47

I understand NOW that it clears the evaporator. NOW the fan(inside the car) doesn't stop blowing ever as long a car is on.this has nothing to do with the fan coming on to clear the evaporator. do I need to replace the resister?

nsjames · Post by **nsjames** » 02 May 2016, 09:34

maybe. it could be a CCM fault too.

or it could be automatic air quality things.

which CCM unit do you have?

jquick1 · Post by **jquick1** » 02 May 2016, 09:38

I dont know that much about Volvos. What is CCM

nsjames · Post by **nsjames** » 02 May 2016, 09:39

climate control module.
the big panel with all the climate controls. It's all electronic and controlled from there.

jquick1 · Post by **jquick1** » 02 May 2016, 09:46

Oh ya.lol Its has the turn nobs.cars not here cant go look at it.