C30 General : - Air con fans not blowing

Hardmaninc · Mar 21st, 2021, 10:09

Hi All

So got an odd issue my car c30 r design 2010, the battery went flat I got it bump started and now the car starts, I get heat in the car but the actual fans do not blow any air around now. Any ideas is it the battery is not giving enough power to spin them up or ? Any idea's all please.

Thanks
Ryan

Meteor · Mar 21st, 2021, 11:43

The blower is controlled by a digital signal from the CEM.

I had this and it magically cured itself after a couple days. But the CEM was water-damaged, and no blower was a symptom. A reconditioned CEM might be the only cure -- about £300.

You could try unplugging and replugging all the connectors on the CEM. Look for signs of corrosion.

Any water leaks in the car and the CEM is basically screwed -- it doesn't have moisture protection.

Hardmaninc · Mar 21st, 2021, 11:58

ahh ok i think its had a bit of a leak in the car due to it not being used much so chances are its gone ?

Quote:

Originally Posted by Meteor

The blower is controlled by a digital signal from the CEM.

I had this and it magically cured itself after a couple days. But the CEM was water-damaged, and no blower was a symptom. A reconditioned CEM might be the only cure -- about £300.

You could try unplugging and replugging all the connectors on the CEM. Look for signs of corrosion.

Any water leaks in the car and the CEM is basically screwed -- it doesn't have moisture protection.

Meteor · Mar 21st, 2021, 12:10

There's every chance I'm afraid.

Not using the car shouldn't result in a leak though. But if there's moisture in the car, e.g. first thing on a cold morning the windows are misted up, or the carpets feel damp, it's probably killed the CEM.

Hardmaninc · Mar 21st, 2021, 12:37

yeah, think its just moisture in the air odd that its only the blower not work I guess I could give it a cleanout to see if it's dry etc 1st but guessing it's just more likely dead?

Quote:

Originally Posted by Meteor

There's every chance I'm afraid.

Not using the car shouldn't result in a leak though. But if there's moisture in the car, e.g. first thing on a cold morning the windows are misted up, or the carpets feel damp, it's probably killed the CEM.

MDS40 · Mar 21st, 2021, 14:48

If you are going to unplug the cem connections then give them all a good dose of contact cleaner and a going over with a soft toothbrush.
It solves no end of electrical gremlins on the Volvo.
Don't forget to disconnect the battery before starting.

Hardmaninc · Mar 21st, 2021, 14:57

Quote:

Originally Posted by MDS40

If you are going to unplug the cem connections then give them all a good dose of contact cleaner and a going over with a soft toothbrush.
It solves no end of electrical gremlins on the Volvo.
Don't forget to disconnect the battery before starting.

Yeah I was thinking it can only help, I was thinking of using the below stuff as I been told its good for cleaning? Thanks

https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1

Mar 21st, 2021, 10:09	#1
Hardmaninc New Member Last Online: Mar 21st, 2021 16:38 Join Date: Mar 2021 Location: Manchester	Air con fans not blowing Hi All So got an odd issue my car c30 r design 2010, the battery went flat I got it bump started and now the car starts, I get heat in the car but the actual fans do not blow any air around now. Any ideas is it the battery is not giving enough power to spin them up or ? Any idea's all please. Thanks Ryan

Mar 21st, 2021, 11:43	#2
Meteor New Member Last Online: Apr 10th, 2024 10:47 Join Date: Dec 2020 Location: Exeter	The blower is controlled by a digital signal from the CEM. I had this and it magically cured itself after a couple days. But the CEM was water-damaged, and no blower was a symptom. A reconditioned CEM might be the only cure -- about £300. You could try unplugging and replugging all the connectors on the CEM. Look for signs of corrosion. Any water leaks in the car and the CEM is basically screwed -- it doesn't have moisture protection. Last edited by Meteor; Mar 21st, 2021 at 11:45.

Mar 21st, 2021, 14:48	#6
MDS40 Senior Member Last Online: Apr 1st, 2024 17:55 Join Date: Sep 2017 Location: Berkshire	If you are going to unplug the cem connections then give them all a good dose of contact cleaner and a going over with a soft toothbrush. It solves no end of electrical gremlins on the Volvo. Don't forget to disconnect the battery before starting. __________________ 2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new.

Mar 21st, 2021, 12:10	#4
Meteor New Member Last Online: Apr 10th, 2024 10:47 Join Date: Dec 2020 Location: Exeter	There's every chance I'm afraid. Not using the car shouldn't result in a leak though. But if there's moisture in the car, e.g. first thing on a cold morning the windows are misted up, or the carpets feel damp, it's probably killed the CEM.

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