Why is my Porsche 944 air conditioning not working?
Porsche 944 Air Conditioning Part IIIa 7-15-2010 The A/C just turned off while driving. Pressure seems good, the compressor clutch engages when jumpered to 12V. But the compressor is not getting 12V when the A/C is turned on. The shop manual suggests troubleshooting from the low-pressure cutoff switch on back, which makes sense.
What kind of oil do you use in a Porsche 944 air conditioner?
PAG is short for polyalkylene glycol. PAG-46 is recommended for the stock ac compressor. It does not mix with the mineral oil used in R-12 systems, so all the old oil must be cleaned out. There is also POE (polyol ester) which is supposedly less incompatible with mineral oil and is compatible with PAG oil.
Is it possible to trouble shoot a Porsche air conditioner?
To trouble shoot the Porsche air conditioning system can be simple, then maybe not so simple. And you don’t want to hear the cliche “take it to a qualified Porsche technician”.
What to do if your Porsche 944 has a leak?
Open valves and run vacuum pump for 30 minutes, to boil off all moisture. Close valves and make sure vacuum is held. If not, there is a leak. This is a good time to add oil, if needed. Pour some in the hose, the R134 will push it into the system. Open high-side (red) valve. This will let some of the R134 go into the system.
Porsche 944 Air Conditioning Part IIIa 7-15-2010 The A/C just turned off while driving. Pressure seems good, the compressor clutch engages when jumpered to 12V. But the compressor is not getting 12V when the A/C is turned on. The shop manual suggests troubleshooting from the low-pressure cutoff switch on back, which makes sense.
PAG is short for polyalkylene glycol. PAG-46 is recommended for the stock ac compressor. It does not mix with the mineral oil used in R-12 systems, so all the old oil must be cleaned out. There is also POE (polyol ester) which is supposedly less incompatible with mineral oil and is compatible with PAG oil.
To trouble shoot the Porsche air conditioning system can be simple, then maybe not so simple. And you don’t want to hear the cliche “take it to a qualified Porsche technician”.
Open valves and run vacuum pump for 30 minutes, to boil off all moisture. Close valves and make sure vacuum is held. If not, there is a leak. This is a good time to add oil, if needed. Pour some in the hose, the R134 will push it into the system. Open high-side (red) valve. This will let some of the R134 go into the system.
Where is the fill jumper on a Porsche 944?
Fill Jumper low-pressure cutoff switch (next to left headlight) Hook up R134 can to hoses (purge air from line) This is a good time to add oil, if needed. Pour some in the hose, the R134 will push it into the system. Open high-side (red) valve. This will let some of the R134 go into the system.
What kind of air conditioning does a Porsche 944 use?
There’s no reason to change the fittings–you can fill it with R-134A thru the R12 style schrader valves. Porsche 944 Air Conditioning Part II 6-10-2006 The air conditioning held out for 2005, but would not cool any more for 2006. Filling it with the R-134A adapter attached was just not possible.
Fill Jumper low-pressure cutoff switch (next to left headlight) Hook up R134 can to hoses (purge air from line) This is a good time to add oil, if needed. Pour some in the hose, the R134 will push it into the system. Open high-side (red) valve. This will let some of the R134 go into the system.