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🙁 my 94 mustang is having a bit of ac trouble. ok lets start out with saying i bought the car with a broken transmission and the trans was pulled when i bought, so i went in to buying the car blind. (more difficult to fix then i thought) but back to the ac. last summer the car was not driven daily but still drove so i put 1 can of freon just to see what would happen and the ac worked good but you could tell it hadn’t worked in a while because the compressor was kinda noisy when it kicked in. when i put the can in it sucked it quickly and when i took the guages off a small hissing came from the valve but i put the cap on and it seemed like it went away. but it worked good still .since i only put 1 can in it still kicked off and on. 2 weeks later it stopped working again which i kinda figured but when i check the pressure by pushing the valve a tiny bit and it had pressure still in it. so i am clueless what is wrong with it. i live in texas and summer is close so i need fixed asap. so what is up? bad valve? also why is it so noisy?FYI System is r-134a
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The charge is low, not empty. There is a sensor that is looking for a given prsssure to run. I am assuming you used a 12 oz can and that may have not been enough to charge the system. The noise can be lack of oil in the compressor or contaminates. There are other moving parts and some noise in a working system. Also AC system should be run so the oil lubs the system, how long has it not run?
Replace the valve and recharge, put dye in the system to check for leaks. Recharge the system using the temp, high and low pressures. There are chart on the internet look up ‘super cooling’ Also compressure will go on and off depending on the high pressure reading. Look at having the charge done by a cert tech. Getting the right charge in without air is not that easy.
I know the basics of ac with the switch and stuff and needing vacuuming, etc yes I put 1 can in the littler one the 2 u can get. I am not sure how long the ac hasn’t worker but I’m guessing a while. But ok I will take it to a shop and get a diagnoses
well i looked at my a/c valves today and they don’t look like normal ones they look like they have a mesh screen covering them and when i pushed the valve in it hissed for about 1 second and then stopped. i also noticed that the hose is lose on the low pressure side going to a canister thing where the pressure switch is. so now i am even more confused.
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