So you want to recharge the AC on your car?

Reposted from my forum post on rennlist.

I am going to start with re-charging an otherwise working A/C system.
– It has started to short cycle, meaning you can hear the A/C compressor under the hood clicking on for 3 seconds, and then off for 3 or 4 seconds repeatedly.
– It is not cooling well at all. I have to leave the A/C on full blast for a good 5 minutes on an 80 degree day to get any real cooling in the cabin.
– It is NOT my Porsche, but the process and theory are exactly the same. Repair and certain diagnostics are a different matter, as this has a capilary tube and accumulator where our cars have an expansion valve and receiver/dryer.
– It is R134a. If you re still on R-12, things aren’t much different other than the refrigerant costing 3x as much and you need an EPA cert ($20 online) to purchase it.
It is 83 degrees F outside, with 70% relative humidity.

I am going to start with re-charging an otherwise working A/C system.

– It has started to short cycle, meaning you can hear the A/C compressor under the hood clicking on for 3 seconds, and then off for 3 or 4 seconds repeatedly.

– It is not cooling well at all. I have to leave the A/C on full blast for a good 5 minutes on an 80 degree day to get any real cooling in the cabin.

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