Took my truck into a mechanic to get it fixed about a month ago. He said the fluid was a little low and replaced it, they pressure checked and also said it didn't leak. After they put new fluid in it, the AC worked well for about 24 hours. Now it is blowing warm air again and still completely shuts off when I go over 60 mph. Any ideas on whats wrong?
Thanks in advance
2007-06-09 06:58:29 · 4 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
How can I tell if the compressor works? Also seemed like a leak to me but he said they pressure checked it. Maybe he had no idea what he was talking about.
2007-06-09 07:08:16 · update #1
It sounds to me like you have a leak. Though they did a pressure test that does not mean they did it correctly. The GM guy is correct about how to test for leaks. If you have a newer car, 1990ish-now, you will most likely have freon type R-134A. R-12 is now illegal to use in cars unless that was originally the type put in by the manufacture. To test the compressor you will have to have some coolant in your A/C system, or it will never turn on. If you are 100% sure that you have R-134A in your system you can go to Wal-Mart and buy a small can of it yourself, service your car and go from there. They sell ones with gauges on it so you can tell when its full. Have you car running and A/C on full blast. If your compressor kicks on while servicing then you know that you compressor is not bad but you do have a leak somewhere in you lines, or the compressor can leak as well. Its not a fullproof way of troubleshooting but it might be worth a try instead of paying $$$ just to find out you have a leak.
2007-06-09 07:58:21 · answer #1 · answered by mr_roszyk 1 · 0⤊ 0⤋
The normal test for a leak is to apply vacuum to the system with an a/c machine for about an hour---if it holds vacuum, there should be no leaks--if it does not, you can check for leaks with a freon sniffer or put dye in the system and check with a blacklight. R134 freon has smaller molecules than R12 and tends to leak more at orings unless it's triple oring type sealing system. Sounds like you have a leak and the system is low on freon causing it to turn off----maybe the guy wasn't a very good a/c tech especially since he said the fluid? was low---did he mean freon? or a/c oil? and checking pressure does not always reveal a slow leak. Try another shop---ask around for references to a good one or check with AAA. Ask for a warranty and if the a/c stops working in a day or two, take it back right away.
2007-06-09 07:23:51 · answer #2 · answered by paul h 7 · 0⤊ 0⤋
he may have mixed gases not knowing what was in it. do u know if the compressor tiurns? if it does then it has a blockage or something like that. find a good a/c guy, bite the bullet and get it fixed right
2007-06-09 07:03:01 · answer #3 · answered by spotlite 5 · 0⤊ 0⤋
It could have a leak after all. Take it back to him and let him figure it out.
2007-06-09 07:02:57 · answer #4 · answered by Ron B 6 · 0⤊ 0⤋