C63 amg air con hotter than cold setting

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Pat gas 1

Active Member
Joined
Oct 17, 2017
Messages
74
Location
Wales
Car
2013 c63 amg pp,Noble m12 gt03,Mazda cx-3
Re gassed my air con last year as the light was flashing, this is low refrigerant I believe .
Two weeks ago a speed/abs sensor packed in but replaced and all ok. Now for some reason my air con is hotter than the cold setting heeeeelp
 
Sorry I don’t understand what you mean - what is hotter than what?

Do you mean the air from the vents is hotter when the air con is on than when the air con is off for the same temp setting?
 
Yes heater on coldest setting is cooler than the air con on, I’m sure I had it re gassed a couple of years back and there wad a flashing ac light. I don’t have that this time.
 
Mine blew red hot today for about a minute then the cold came through. You may have a problem. Unrelated to speed sensor.
 
I have definitely got a problem ☹️
 
I would check to see if the engine fan at the front is running, in my limited knowledge this may well be refrigerant being low but not enough to make the light flash, I had a similar issue with my C220 W204. if you have a MB indy near you or an Car aircon specialist near I think putting a set of gauges on the Aircon will reveal a lot and save guess work

Good Luck

Alan
 
You can buy a gauge from Halfords to check it yourself


Also , if you can see the ac compressor , just look and see if it is turning ; it will only engage if there is enough gas in the system.
 
Hi Pat,

Are you still looking at selling your car? I would welcome some further details if this is possible.

Thanks in advance

Tom
 

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