AC Compressor Question - Does yours get hot
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Joined: Nov 2009
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From: Cheshire, UK
AC Compressor Question - Does yours get hot
Chums - Question for the air-cooled brigade in the US given your climate.
Now that I have got my 964 AC working (not yet perfect) I have noticed that when 'on' and the compressor clutch is functioning etc after a run of 7-10 miles the compressor body is very hot - enough that you could not keep your hand on it
I thought possibly heat transfer from the engine so today I did the same run without the AC on and discovered it was only just warm with a fully hot engine ruling out heat transfer. Therefore heat must be generated when it is engaged.
When the AC is working the rearmost top pipe is cold with condensation on it whilst the fore pipe is hot like the compressor body.
Is this normal? I cant remember with my 993 but I have the same compressor/clutch as 993 (Original Denso?)
Now that I have got my 964 AC working (not yet perfect) I have noticed that when 'on' and the compressor clutch is functioning etc after a run of 7-10 miles the compressor body is very hot - enough that you could not keep your hand on it
I thought possibly heat transfer from the engine so today I did the same run without the AC on and discovered it was only just warm with a fully hot engine ruling out heat transfer. Therefore heat must be generated when it is engaged.
When the AC is working the rearmost top pipe is cold with condensation on it whilst the fore pipe is hot like the compressor body.
Is this normal? I cant remember with my 993 but I have the same compressor/clutch as 993 (Original Denso?)
Rennlist Member
Joined: Jun 2004
Posts: 1,079
Likes: 61
Yes, compressors do get hot to the touch when the clutch is engaged,
and its normal to have condensation on the larger suction line and the smaller outlet line is warm.
Most importantly, if you have been working on the system yourself, say you evacuated and charged it with refrigerant, there is sufficient refrigerant oil in the system.
Have you checked and documented your low and high side pressures, at idle, along with the outside air temperature at the time?
Griff
http://www.griffiths.com/shop/index....cPath=15_16_56
http://www.griffiths.com/achelp/
and its normal to have condensation on the larger suction line and the smaller outlet line is warm.
Most importantly, if you have been working on the system yourself, say you evacuated and charged it with refrigerant, there is sufficient refrigerant oil in the system.
Have you checked and documented your low and high side pressures, at idle, along with the outside air temperature at the time?
Griff
http://www.griffiths.com/shop/index....cPath=15_16_56
http://www.griffiths.com/achelp/