I can’t figure out what this thing is thinking. I turn on a/c and it takes a mile of driving before it starts to cool. Other times it engages right away. On hot days here in Miami Florida it is unbearable. That’s when it takes forever to cool. Don’t tell me about heat load and time needed to cool car. No. I mean right out of the vents. It should cool somewhat within a few seconds. I am an a/c technician (not automotive) but this car killing my ego. Please shine a light for me.

have you performed work on the car and what kind ?

Yes I have. In regards to air-conditioning I have triple evacuated system and charged with fresh 134A. System holds a charge and does not show symptoms of leaks. My problem is finding the correct amount of refrigerant required. Throughout my searches I have come across many ranges of pressures depending on ambient temps. I’ve adjusted pressures up and down a few times. But I feel there must be a relay or something not behaving as it should and delaying compressor engagement. At some standstills the unit starts blowing warm air. I am stumped.

I did this before too.

I think you put too much refrigerant in the system cause the ac clutch to seize.

Run the ac system and engine and evacuate the system until you see the ac clutch engage. The car needs very low pressure otherwise damage can occur to the cooling fan and sound like a jet engine.


Any information you have gotten from people about pressures is incorrect and wrong. Disregard that info.


There should be a sticker on your car with a kg or g value for r134a. I can send an example of the one on my gl Tom. Follow it to the letter.

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I’m done wasting time with it. I don’t have the right equipment. I’ll take it to a really great specialty shop I know of who specializes only on automotive A/c. Thanks for your info.