A/C not blowing cold air

[roaniecowpony]

Ehh, with the price of Freon these days, and given you will lose a little bit just from checking, I’d check data and obvious circuits first. If access to a scanner is available, you can check refrigerant pressure directly without loss of expensive 1234yf.

If you have good fittings, the loss is not measureable. Still, the point is to check the pressures, before messing around chasing red herrings. For my old JL, I just use 134. Cheap and works the same. No freon police in my neighborhood anyway.

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[DaltonGang]

I use 134A in my JL too. I have been using it for well over a year.

 

[roaniecowpony]

I use 134A in my JL too. I have been using it for well over a year.

2 for me. Friend too. Mine can dip into the high 30s. I believe Canadian JLs came with 134

 

[alphawolff]

Ehh, with the price of Freon these days, and given you will lose a little bit just from checking, I’d check data and obvious circuits first. If access to a scanner is available, you can check refrigerant pressure directly without loss of expensive 1234yf.

I want to add onto this - The factory sensor (and hell, even gauges) can and will read 70-120 PSI on the system, the compressor clutch will engage, but no cool air because the system is actually completely empty. The general telltale is pressure isn't increasing as you'd expect with the compressor engaged.

No idea what it's compressing, air/oil or something I guess, but I've seen this dozens upon dozens of times now.

I just wanted to mention it. Generally if I see the compressor engaging, normal resting/ambient pressure on the scan tool, but evaporator temperature is hot, it's actually empty more often than not.

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