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I've got a 1998 Ford Clubwagon. The AC works when I give it a couple of cans of 134a so I know the compressor in coil work, but it loses it's cool in a few days. Can anyone recommend a leaker sealer that actually works?
I hope someone has a better answer than I do but when that happened to my old Explorer I was told I'd have to replace the cooling unit. It's amazing how fast one can get used to the heat when the repair bill is more than the vehicle is worth.
~~Don't worry about old age; it doesn't last that long.
Find a shop that has a leak detector for R134a. They can add about a pound of it and then go find out where the leak is. If you're lucky it's a hose or fitting. If it's compressor seals then you're in for some big $$$ to fix it.
Gear Junkie has a good idea. Also before doing anything else really look over the compressor, lines and the coil that's directly in front of the engine radiator. If you have a serious leak, the compressor oil will have squirted out and will leave a mess you should be able to see.
Part 2: Before adding anymore R134a really clean up under the hood. Wipe everything clean with "Rags In A Box" or such. Then if you add more and some oil leaks out it will be easier to spot.