frenek

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

chassis

Pleaee post a photo of the aircon controls when the problem you describe is happening.

frenek

this happens every time when I start and the engine is still warm

these are the conditions I normally use, off or LO

pl626

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...

frenek

hot air after using A/C is pretty normal with all cars , I have the problem without having A/C in use.

chassis

Air conditioning appears to be turned off.

frenek

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

Chevota

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.

frenek

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.

Mr. Toad

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.

Chevota

then id go with the flap actuaters that control the air path. I cant recall if these use vacuum or not but if it does than a leak or low vacuum will cause that stuff.

pl626

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.

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?

frenek

Sorry we are talking about W207 or W212, W210 and W211 are different.

May be it has to do with valves and valves control.
https://mbworld.org/forums/e-class-w...d-heating.html