Search found 366 matches

by Dougflas
Tue Jun 01, 2021 5:34 am
Forum: Automotive Air Conditioning Forum
Topic: No Measurable High Pressure GM A6 Replacement
Replies: 22
Views: 538

Re: No Measurable High Pressure GM A6 Replacement

Keep the muffler. Just do something about the connector fitting. Why not pruchase your own manifold ? You will use it enough to make your money back.
by Dougflas
Tue May 18, 2021 5:56 pm
Forum: Automotive Air Conditioning Forum
Topic: 1977 Chevy G20 Van Evaporator Service
Replies: 5
Views: 266

Re: 1977 Chevy G20 Van Evaporator Service

Does the inside evaporator have hoses to bring the cool air to the driver's seatside? It may be a simple electrical add on system. Do the controls have a knob for fan and speeds and another for cooling level? Some photos would be helpful. The Ac electrical system maybe very simple. I am thinking the...
by Dougflas
Mon Apr 19, 2021 11:13 am
Forum: Automotive Air Conditioning Forum
Topic: 1979 Lincoln ATC
Replies: 7
Views: 853

Re: 1979 Lincoln ATC

send some photos of the under hood items near the evaporator. We need to see if there was a system change over.
by Dougflas
Sun Apr 18, 2021 5:25 am
Forum: Automotive Air Conditioning Forum
Topic: 1979 Lincoln ATC
Replies: 7
Views: 853

Re: 1979 Lincoln ATC

Sounds like the POA was changed to a POA eliminator set up. Do not forget you have in car temperature sensors. As mentioned, A6 compressors were not meant to be cycled. GM cycled them for one year and they found out what happens. Then they went to the R4 with larger clutch surfaces. This was around ...
by Dougflas
Fri Apr 16, 2021 4:56 am
Forum: Automotive Air Conditioning Forum
Topic: AC working, but vent air still not cold
Replies: 5
Views: 729

Re: AC working, but vent air still not cold

clamp off the heater hoses. You may have a reheat problem.
by Dougflas
Sun Apr 04, 2021 7:23 am
Forum: Automotive Air Conditioning Forum
Topic: A/C blowing hot air
Replies: 9
Views: 1373

Re: A/C blowing hot air

Take it one step at a time. You do not need the refrigeration system to check and repair the inside blower system. Make sure the blower system is working correctly. 2002 model years probably used vacuum actuators to move the airflow if I remember correctly. There are repair kits in the field so you ...
by Dougflas
Tue Mar 16, 2021 3:45 am
Forum: Automotive Air Conditioning Forum
Topic: POA valve cleaning and calibrating
Replies: 6
Views: 1036

Re: POA valve cleaning and calibrating

yes that is an adjustment screw. You would use a 7/32 socket and probably a pair of long nose piers. The socket will hold the adjustment while you tighten the screw. It is bear and you will see what I mean. If using R12, you should not have to touch it. I would use clean mineral oil for flushing. Th...
by Dougflas
Mon Mar 15, 2021 12:31 pm
Forum: Automotive Air Conditioning Forum
Topic: POA valve cleaning and calibrating
Replies: 6
Views: 1036

Re: POA valve cleaning and calibrating

There were instructions on testing in the tips section but they are long gone due to upgrades. POA lo side should be 28 to 32 PSI with r12 depending upon your sea level. Test off the vehicle by connecting high side hose to shop air about 65 to 75 PSI. Connect manifold middle hose to input of POA and...
by Dougflas
Sun Feb 14, 2021 5:17 pm
Forum: Automotive Air Conditioning Forum
Topic: New A/C compressor locked up after not operating for 6 months
Replies: 10
Views: 3833

Re: New A/C compressor locked up after not operating for 6 months

Original post states system worked fine and went bad after sitting 6 months. Also, rear fitting may be for a low charge switch thus 1/4 inch flare fitting.
by Dougflas
Sat Jan 23, 2021 5:27 am
Forum: Automotive Air Conditioning Forum
Topic: Help with refrigerant
Replies: 4
Views: 1308

Re: Help with refrigerant

At the minimum, a complete disassembly and flushing should be done. How do you know a buy did not get into the system? I would suggest you also replace the hoses and POA as well as the TXV. I would also pull the evaporator and replace the foam rubber mountings so you do not have air leaks around the...