Automotive Air Conditioning Information Forum

A/C appears to work good, nice cool temps out of the vents. Suddenly the A/C quits cooling and maximum heat comes out of the vents. A/C controls have not been touched when this happens. On a restart A/C may work fine for an extended period of time or switch to the "heat from hell (my wife's car ...

A/C appears to work good, nice cool temps out of the vents. Suddenly the A/C quits cooling and maximum heat comes out of the vents. A/C controls have not been touched when this happens. On a restart A/C may work fine for an extended period of time or switch to the "heat from hell (my wife's car ...

Easy options:
1. Turn OFF the HVAC button before starting the engine.

2. Unplug the harness to the compressor

3. Remove the fuse for the compressor

It's OK to just let the compressor's pulley freewheel. If somehow your pulley is locked up to the compressor drive plate, you'd have to remove the ...

p5200 wrote: Sat Mar 28, 2026 7:30 am Amazon has Elitech Leak detector for about $10.00 more than the HF $180 VS 190.

The board sponsor, ackits.com has this unit
https://www.ackits.com/tools/electronic ... -43-mt2734


I have HF 92514, about $65.

Whats best for leak testing? Harbor Freight locally, has an electronic tester not sure about their quality though.

1. I've had a Harbor Freight electronic refrigerant leak tester for quite a few years; it seems to work OK.

2. I've used a combination of visual examination for refrigerant oil ...

1. Maybe get the system recovered to see if the correct amount of refrigerant was added initially and/or still present.

2. Even though it held vacuum, I wonder if you have a leak.

3. Are the pressure reading you posted measured at about 2000rpm?

Don't forget to check whether heated air from your heater is getting through too.

I bought two 12 oz. cans of pure R134a at Phx Walmart last week for $9.99 each.

We bought a 1984 Jeep Cherokee in 1988, and that had manual service shut off valves (no schraeders at all) and their cover caps were loose fitting aluminum just to keep dust out.

In the early 1990s the compressor seized, and new compressors were about $600-$700 which was a ton then. I bought a ...

When I worked for Delphi Thermal, the refrigerant lines and hoses people informed me that the plastic caps are designed to be the primary seals- that's why they have a rubber element or washer or seal in them. The shraeder valves are there to hold in the refrigerant just long enough to get the ...