A/C Temp Readings - Cooling Issue?
Thread Starter
Racer
Joined: Apr 2012
Posts: 284
Likes: 3
From: Rochester New York
A/C Temp Readings - Cooling Issue?
I had my a/c compressor, dryer and orifice tube replace the Saturday. I got the car back and found that it just doesn't feel cold enough. I checked the internal vent temperature and it goes down to 51 degrees. I was expecting something closer to low 40's. Temps were low 80's outside today average humidity for NY. Is this normal for a '98 C5?
Melting Slicks
Joined: Jul 2006
Posts: 2,332
Likes: 31
From: Silver Spring MD
40 degrees more like it
Are you low on Freon? If they just replaced the orfice tube and dryer should have evacuated and then added about 1.6 # of R134a. Thats roughly 2 14 oz cans. Mine was not cooling and I added a can of R134a.
Now down to 40 degrees recirc at 2000RPM on an 85 degree day.
If not evacuating the system then some air could be inside which will reduce efficinecy of the system. Sounds like you didn't do this yourself.
Go check with the person who did. My pressures after adding freon are 250PSI high and 30PSI low. Should be somewhere in this range.
Now down to 40 degrees recirc at 2000RPM on an 85 degree day.
If not evacuating the system then some air could be inside which will reduce efficinecy of the system. Sounds like you didn't do this yourself.
Go check with the person who did. My pressures after adding freon are 250PSI high and 30PSI low. Should be somewhere in this range.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Are you low on Freon? If they just replaced the orfice tube and dryer should have evacuated and then added about 1.6 # of R134a. Thats roughly 2 14 oz cans. Mine was not cooling and I added a can of R134a.
Now down to 40 degrees recirc at 2000RPM on an 85 degree day.
If not evacuating the system then some air could be inside which will reduce efficinecy of the system. Sounds like you didn't do this yourself.
Go check with the person who did. My pressures after adding freon are 250PSI high and 30PSI low. Should be somewhere in this range.
Now down to 40 degrees recirc at 2000RPM on an 85 degree day.
If not evacuating the system then some air could be inside which will reduce efficinecy of the system. Sounds like you didn't do this yourself.
Go check with the person who did. My pressures after adding freon are 250PSI high and 30PSI low. Should be somewhere in this range.
Have the system pressures and performance rechecked. They should stand behind the repair!
Thread Starter
Racer
Joined: Apr 2012
Posts: 284
Likes: 3
From: Rochester New York
Are you low on Freon? If they just replaced the orfice tube and dryer should have evacuated and then added about 1.6 # of R134a. Thats roughly 2 14 oz cans. Mine was not cooling and I added a can of R134a.
Now down to 40 degrees recirc at 2000RPM on an 85 degree day.
If not evacuating the system then some air could be inside which will reduce efficinecy of the system. Sounds like you didn't do this yourself.
Go check with the person who did. My pressures after adding freon are 250PSI high and 30PSI low. Should be somewhere in this range.
Now down to 40 degrees recirc at 2000RPM on an 85 degree day.
If not evacuating the system then some air could be inside which will reduce efficinecy of the system. Sounds like you didn't do this yourself.
Go check with the person who did. My pressures after adding freon are 250PSI high and 30PSI low. Should be somewhere in this range.
Melting Slicks
Joined: Jul 2006
Posts: 2,332
Likes: 31
From: Silver Spring MD
When I had insufficient cooling cleaned the condensor was the orfice tube
Can you tell me the humidity at the time you checked? It was done by a professional a/c guy and he put in the recommended 1.60#. To be fair, I did not have a chance to look at the fans and to be sure there is no debris in the condenser. I suppose either of those things could cause it to not cool properly. Just looking for an idea of what it should put out in NY climate.
I would go back and have the system checked and fixed by the technician you had work on the car. Very few components in the system, compressor, orfice tube, evaporator, condensor, and dryer/strainer plus the refrigerant lines. Should not be hard to see what isn't functioning.
Burning Brakes
Joined: Aug 2002
Posts: 926
Likes: 2
From: chandler az
If I remember correctly our compressors are variable valve compressors which will make the pressure readings vary from a normal fixed valve compressor based on RPMs. If he added by weight you really can't do that wrong if the system was vacuumed down first. have you checked temperatures on both sides(driver and passenger) to see if the blend doors are working?
