WolfieS
Member
Hi,
Having posted last year that, following an accident – Aircon undamaged – my Aircon would not switch ‘on’ despite the switch in the Centre Console illuminating, I finally carried out some ‘back to basics’ fault diagnosis where it transpired that there was power going to the Aircon Compressor Clutch but the clutch was not engaging. Consequently, the compressor was changed.
However, this proved not to be a full resolution to my Aircon maladies … the Aircon Clutch did initially engage for a few seconds but then switched ‘off’ again and would then not operate. After pulling all the gas back out (again), refitting the old Temp/Pressure Switch (I had fitted a new one ‘just in case’) and refilling the system, the Aircon Clutch then sprang back into life and the Aircon started to work … HOWEVER, now the Aircon will not switch ‘off’.
When I press the illuminated Centre Console Aircon Button, the light goes off, then flashes slowly for a few seconds, and then illuminates again. The Aircon Clutch does not disengage – even when I switch the Climate Control ‘off’, the Aircon Clutch remains engaged.
If I turn the Climate Control up to max, the heat does increase a little but seemingly commensurate with the Aircon also operating. If I turn the Climate Control selectors to minimum, the fans increase (slowly) to half of full speed and that is as fast as they run in ‘Auto’. Moreover, I would not say that the car gets particularly cold. Almost as if the Aircon is not working at full efficiency.
Any ideas as to what might be the fault or how to proceed with diagnostics?
Regards
Wolfie Souter
2005 SL350, Westbury, Wiltshire, UK
Having posted last year that, following an accident – Aircon undamaged – my Aircon would not switch ‘on’ despite the switch in the Centre Console illuminating, I finally carried out some ‘back to basics’ fault diagnosis where it transpired that there was power going to the Aircon Compressor Clutch but the clutch was not engaging. Consequently, the compressor was changed.
However, this proved not to be a full resolution to my Aircon maladies … the Aircon Clutch did initially engage for a few seconds but then switched ‘off’ again and would then not operate. After pulling all the gas back out (again), refitting the old Temp/Pressure Switch (I had fitted a new one ‘just in case’) and refilling the system, the Aircon Clutch then sprang back into life and the Aircon started to work … HOWEVER, now the Aircon will not switch ‘off’.
When I press the illuminated Centre Console Aircon Button, the light goes off, then flashes slowly for a few seconds, and then illuminates again. The Aircon Clutch does not disengage – even when I switch the Climate Control ‘off’, the Aircon Clutch remains engaged.
If I turn the Climate Control up to max, the heat does increase a little but seemingly commensurate with the Aircon also operating. If I turn the Climate Control selectors to minimum, the fans increase (slowly) to half of full speed and that is as fast as they run in ‘Auto’. Moreover, I would not say that the car gets particularly cold. Almost as if the Aircon is not working at full efficiency.
Any ideas as to what might be the fault or how to proceed with diagnostics?
Regards
Wolfie Souter
2005 SL350, Westbury, Wiltshire, UK