Engine Size: 1.8t
Refrigerant Type: r134a
Ambient Temp: 64
Pressure Low: 30
Pressure High: 80
Just tried using the a/c yesterday and noticed that it is not blowing cold. I was thinking about using one of those DIY recharge in a can but decided against doing it. I was able to borrow a set of gauges from my neighbor to check and see what the pressures are. He was thinking that the compressor was no good and needs to be replaced because the high side is low. Is he guessing right? I prefer not to take it into a shop right away and pay them to tell me the same thing.
Yes he is guessing, and I am glad you did not buy a DIY "death kit". Stay away from the cans that contain anything other than pure refrigerant. Pressures are used to measure performance. But without first verifying the accurate charge (by weight) is in there, pressures are unreliable and can be deceiving. If you are not tooled and experienced, a shop can perform a recover, vacuum, and recharge to validate or disprove your neighbors guess.
I've read that 60+% of refrigeration issues in vehicles are due to loss of refrigerant. So agree that you need to have the mount of R134a in your system measured, and if low: the leak repaired. If your system is low and you add pure refrigerant yourself, it's just guessing and that will also leak out.
It's not legal to add refrigerant to a known-leaking system except for the express purpose of pinpointing that leak, as I understand it.
Thanks for the replies. Maybe I'll just take the car in to a shop that is capable of doing the work. I don't have the tooling to deal with a/c systems and don't want to start guessing and throwing money at parts.
It does look like it was just a leak-out, the compressor is pulling the low side down to 30 like it should but the high side only being 80 suggests there is just nothing in the system to pump. When a variable compressor is bad the high side and the low side will stay about the same no matter how much refrigerant there is.
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