Heat vents blowing cold air
Thread Starter
Senior Member
Joined: Jul 2007
Posts: 319
Likes: 16
From: Vancouver, BC
2015 S550V
Heat vents blowing cold air
When I try to put the heat on it will only blow cold air out of the vents, any ideas, I read it could be a water heat valve located under wiper motor or circulating water heater pump
Is this a easy DIY, any info appreciated.
Is this a easy DIY, any info appreciated.
Last edited by 604benz; Dec 4, 2016 at 07:47 PM.
Junior Member
Joined: Aug 2014
Posts: 57
Likes: 10
From: Zurich
S500 4M L
604bezn - did you replaced this part:
https://www.amazon.com/Mercedes-CL55.../dp/B009PQ7YFE
?
I have S500 (with rear climate control) - ordered this part (by VIN) from dealer and I cannot find this under hood.
Do you have any pictures and can you post them or PM me ?
Have issue - I set 16C (cold) on the read - it sending hot air, set 28C (hot) sending little warm.
p.s. I checked duo-control valve located behind right front whell (replaced it becuase on SD there was an error of this valve - after removal one of valves was damaged) still the same.
Thank you,
Mariusz
https://www.amazon.com/Mercedes-CL55.../dp/B009PQ7YFE
?
I have S500 (with rear climate control) - ordered this part (by VIN) from dealer and I cannot find this under hood.
Do you have any pictures and can you post them or PM me ?
Have issue - I set 16C (cold) on the read - it sending hot air, set 28C (hot) sending little warm.
p.s. I checked duo-control valve located behind right front whell (replaced it becuase on SD there was an error of this valve - after removal one of valves was damaged) still the same.
Thank you,
Mariusz
Last edited by maniekS500; Dec 7, 2016 at 06:36 PM. Reason: add some info
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Member
Joined: May 2016
Posts: 104
Likes: 4
2007 Mercedes S600
Check the coolant first to make sure it's not low, if the level is correct, get it scanned. It could be any number of problems, and throwing parts at a problem before diagnosing it is pretty much always a stupid way of going about it. It's well worth your time even if you're a DIY to pay the dealership a half hour of labor (or an hour or whatever) to have them diagnose it and tell you it needs x part. Then change the part yourself. Saves you time and money in the long run.
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Thread Starter
Senior Member
Joined: Jul 2007
Posts: 319
Likes: 16
From: Vancouver, BC
2015 S550V
Yes that's the part I changed, it was located under wiper motor.
Here's a link
http://www.benzworld.org/forums/w221...ue-only-c.html
Here's a link
http://www.benzworld.org/forums/w221...ue-only-c.html
Last edited by 604benz; Dec 7, 2016 at 08:07 PM.
