Search found 374 matches

by Dougflas
Wed Jul 28, 2021 4:47 am
Forum: Automotive Air Conditioning Forum
Topic: How cool should be vehicle ac be running?
Replies: 12
Views: 91

Re: How cool should be vehicle ac be running?

Depends. How hot was inside vehicle when first started? How long before you checked temps at vents after vehicle started? Was vehicle in the sun before vehicle started? What is the blower speed? Was vehicle moving when temps were taken? Was vehicle at normal operating temp when temps were taken? Rpm...
by Dougflas
Thu Jul 22, 2021 4:32 am
Forum: Automotive Air Conditioning Forum
Topic: POA update r12 should I remove the Thermostatic cycling switch?
Replies: 8
Views: 164

Re: POA update r12 should I remove the Thermostatic cycling switch?

Photos would help answer your question. Is the updated POA an eliminator type
by Dougflas
Tue Jul 20, 2021 5:23 am
Forum: Automotive Air Conditioning Forum
Topic: POA Valve Test/Adjust
Replies: 19
Views: 833

Re: POA Valve Test/Adjust

Make sure your low side gauge is zeroed out before you adjust the valve.
by Dougflas
Sun Jul 04, 2021 4:09 pm
Forum: Automotive Air Conditioning Forum
Topic: AC not very cold at idle, great while driving
Replies: 63
Views: 1834

Re: AC not very cold at idle, great while driving

Do not use superheat or subcooling in MVAC. The compressor speed changes and superheat will also change. Throw those readings out the door. These readings are used in stationary refrigeration because the compressor speed is constant. Get a new belt on there and check the idler and pulleys. Also, dis...
by Dougflas
Fri Jun 25, 2021 4:50 am
Forum: Automotive Air Conditioning Forum
Topic: AC not cold and excessive moisture/water under the car
Replies: 6
Views: 385

Re: AC not cold and excessive moisture/water under the car

Before carrying it to a shop, check the operation of your temperature blend door actuator. If your pressures are correct, the compressor is staying engaged and it is producing that much condensate, the refrigeration portion of the system is probably OK. If the actuator is stuck on "heat",...
by Dougflas
Thu Jun 17, 2021 4:05 pm
Forum: Automotive Air Conditioning Forum
Topic: POA Valve Test/Adjust
Replies: 19
Views: 833

Re: POA Valve Test/Adjust

1/4 turn should get you to 26psi
by Dougflas
Wed Jun 16, 2021 11:57 am
Forum: Automotive Air Conditioning Forum
Topic: TXV Temp Sensor Clamped or Taped Only to Evap?
Replies: 9
Views: 416

Re: TXV Temp Sensor Clamped or Taped Only to Evap?

do not use zip ties. they stretch after a while. As mentioned, use a hose clamp and then cork tape
by Dougflas
Wed Jun 16, 2021 11:54 am
Forum: Automotive Air Conditioning Forum
Topic: POA Valve Test/Adjust
Replies: 19
Views: 833

Re: POA Valve Test/Adjust

1/4 turn counterclockwise from the R12 position gets you real close
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: 1281

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: 460

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...