Automotive Air Conditioning Information Forum

Tim wrote: Mon Jun 22, 2026 7:23 am 2019 Tundra gets 11.5.

Mrs. Cusser's 2014 Yukon Denali with 6.2 engine gets 16mpg unless she's towing a horse. Hopefully its 6.2 engine with AFM is more resistant to the lifter issues of the later years. I did install an AFM disabler module.

I had locked all the threads for a short time. Just turned the main section back on. I'm very busy and can't monitor the site like I once did. John said he would help in that regard. Nice old truck, sure it gets better fuel mileage than my 19 Tundra. :)

Actually, the carbureted 1988 Mazda truck ...

I can see this post.

I think "traffic" on this site is way down because folks don't try or can't fix stuff anymore...or maybe "magic fix in a can" products have ruined many systems already.....

By the way, the evaporator I bought from you in 2000 and the compressor I bought from you in 2014 are ...

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.