Heat vents blowing cold air
#1
Senior Member
Thread Starter
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; 12-04-2016 at 07:47 PM.
#2
It could be many many things. Your car needs to be read and hvac module diagnosed via star/ das. Sorry I cannot be more specific, but there is nothing more to say really ...
#6
Senior Member
Thread Starter
Well I replaced the change over valve, took me around 2 hours to install, heat is working again.
Last edited by 604benz; 12-06-2016 at 05:22 PM.
#7
Junior Member
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; 12-07-2016 at 06:36 PM. Reason: add some info
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#8
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.
#9
Senior Member
Thread Starter
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; 12-07-2016 at 08:07 PM.