W211 Aircon

[Diesel]

Hi guys,

 

Aircon is not cold and was advised to change compressor. But things only improve when car is travelling. Aircon will not be cold and becomes stuffy when car is stationary or slowing down. Beside the compressor what else needs to be changed? Thanks!

[Ah Bui]

Yes... compressor should work wonders....

[Diesel]

Already change compressor. But still only cold when car is travelling. 

[level z]

ouch crazy hot weather now, you should get a good mech to sort it out.

 

PS : I had similar symptom a while back and the air con blower motor died. I doubt your fault is same as mine.

[Diesel]

The blower motor was also recently changed cos it died. 

Its terrible in this kind of weather. But with the symptom of aircon only cold when car is driving indicates weak compressor rather than insufficient gas right?

[level z]

how about the condenser fan. I was told there is 2 step in the fan speed. When air con cuts in, it actually spin faster. 

Possible aircon filter or evaporator partial clog ?

Happen both in recycle and fresh mode ?

 

 

[Diesel]

All aircon filter has been changed. 

Happens in both internal circulation and fresh air mode. 

[level z]

this is a tough one. You should consult a specialist to look into this. Good luck and do report back when it is solved. 

 

[Diesel]

The aircon Condenser is changed and still the same. *scratch head*

[level z]

i google and found this possible faults.

 

- Most point faults to the fan at the condenser or faulty switch controlling that fan.

https://www.google.com.sg/?gws_rd=ssl#q=why+air+con+is+cold+only+when+car+is+moving

https://www.yourmechanic.com/question/air-conditioning-only-gets-cold-when-car-moving

http://www.audizine.com/forum/showthread.php/435874-A-C-cold-when-car-is-moving-warm-at-a-standstill

 

 

[Diesel]

Ok will get mechanic to check out the AC fan. Thanks!