unwanted heating
Thread Starter
Junior Member
Joined: Oct 2021
Posts: 16
Likes: 1
From: Germany
2015 A207 400
unwanted heating
I have the following problem
After driving, parking and starting again warm air is coming out of air nozzles and temperature is coming down very slowly.
Does anybody know this problem or the reason or a solution
After driving, parking and starting again warm air is coming out of air nozzles and temperature is coming down very slowly.
Does anybody know this problem or the reason or a solution
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
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From: unbegrenzt
2017 GLE350 4MATIC
Pleaee post a photo of the aircon controls when the problem you describe is happening.
Senior Member
Joined: Jul 2008
Posts: 296
Likes: 65
2015 E400
My '15 will occasionally blow hot air when the AC is on, but it then blows cold. This is infrequent, so I haven't bothered chasing it, no error codes have ever popped up. Curious if our issues are related...
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
Thread Starter
Junior Member
Joined: Oct 2021
Posts: 16
Likes: 1
From: Germany
2015 A207 400
of cause it is turned of,
what I described has nothing to do with aircon
it is only the fact, that rather warm air is coming out after short parking and when it is warm outside and temperature is on LO
what I described has nothing to do with aircon
it is only the fact, that rather warm air is coming out after short parking and when it is warm outside and temperature is on LO
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Super Member
Joined: Aug 2004
Posts: 954
Likes: 245
E550 Coupe 2wd (2016)
My guess is the climate controls are relaxed when the eng off, which I'd imagine defaults to defrost or heat. Meanwhile the heater core is heating all the ducting. The AC takes time to start working, then it has to cool that ducting before you feel it. If just air then it still has to blow that heat out. If the car is parked in the summer sun, a zillion people can tell you it blows hot *** air for a bit because the entire duct system is even hotter. If you have it on Low then it'll take even longer to get cool.
Without more info it's the best answer I have, but from what described I'd say it's normal.
Without more info it's the best answer I have, but from what described I'd say it's normal.
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Thread Starter
Junior Member
Joined: Oct 2021
Posts: 16
Likes: 1
From: Germany
2015 A207 400
Thanks for response.
All I can say is that it isn't normal. I have this problem with no other car.
It takes too much time to only "blow the heat" out and it happens without sun.
All I can say is that it isn't normal. I have this problem with no other car.
It takes too much time to only "blow the heat" out and it happens without sun.
Super Member
Joined: Sep 2017
Posts: 738
Likes: 163
From: Orlando, FL
2016 E400 Coupe (C207)
Mine does the same thing, although not at startup as the OP describes. Occasionally, while driving and with the AC otherwise functioning normally, the vents will suddenly blow hot air for about five seconds and then gradually cool off again. Dealer was never able to figure it out.
Senior Member
Joined: Jul 2008
Posts: 296
Likes: 65
2015 E400
Mine does the same thing, although not at startup as the OP describes. Occasionally, while driving and with the AC otherwise functioning normally, the vents will suddenly blow hot air for about five seconds and then gradually cool off again. Dealer was never able to figure it out.
It rarely happens so I won't "sweat" it until the AC doesn't blow cold, but definitely curious about the OPs condition. Curious if this happens on any other MY?
Thread Starter
Junior Member
Joined: Oct 2021
Posts: 16
Likes: 1
From: Germany
2015 A207 400
It definitely is not normal. My W210 and W211 never behaved this way. When AC was on, air was always cold, never had any intermittent bursts of hot air. Odd thing is I've never experienced any hot air blowing if the AC is off or on LOW.
I won't "sweat" it until the AC doesn't blow cold, but definitely curious about the OPs condition. Curious if this happens on any other MY?
I won't "sweat" it until the AC doesn't blow cold, but definitely curious about the OPs condition. Curious if this happens on any other MY?
May be it has to do with valves and valves control.
https://mbworld.org/forums/e-class-w...d-heating.html
Newbie
Joined: Feb 2020
Posts: 5
Likes: 0
From: Coastal
2006 ML320cdi Sport
Hope this helps.
