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  • low side dont go over 20 psi - Automotive Air Conditioning Information . . .
    Hi all im working on an 2001 ford f53 chassis motorhome with 6 8l r134a system with 2 75 pound a c stop working so ive put gauge on it and ive see 6inch vacuum on low side and 75 psi on high
  • Diagnosing expansion valve stuck open vs faulty compressor?
    Also, the car's diagnostic mode shows the Evaporator Outlet Temperature is higher than normal - about 60-65 I took it to a shop that checked for leaks (UV dye was already in the system) and found none They believed it was overcharged (by me) and evacuated and recharged
  • Filling R134a from high side in liquid state with engine *OFF*
    Also, there is no chance of slugging the compressor when filling liquid in the high side (can upside down) as it's on the other side of the AC system Has anyone done it this way? It sounds like if you gas fill R134a from the low side (suction) it can take a long while for the car to pull in the 18 7 oz (max) of refrigerant
  • 2012 chevy impala 3. 6 no ac
    So far Ive not had luck with the ac system in this car I can barely get 1 can of refrigerant into the system I know there is no blockage, I know the system holds pressure, Ive changed the expansion valve, I know the clutch engages when I turn on the AC Both service ports seem to be working fine
  • Holding Vacuum When Evacuating, How Long?? - Automotive Air . . .
    This is obviously not practical for an A C shop working on a customer car I'd suggest testing with pressure, a small charge of R134a, low enough pressure to make sure it's only vapor I believe this is also allowed by EPA 609 and 608 regulations, but admittedly I haven't read them recently 50psig and check it the next day when the ambient Air is the same temperature
  • Noise after AC service - Automotive Air Conditioning Information Forum
    freakyhead94 wrote: Sat May 11, 2024 4:21 pm Background info:-preowner converted the AC in 2021 from R-12 to R-134A since it is absolutely impossible to get R-12 in Germany and they can send you to jail if you still charge a system with it (according to his info, the system was flushed, new accumulator, new oil, new o-rings and the evacuation and refill was done by a professional AC machine)
  • Does air get in system when using AC manifold gauges?
    I realize that the AC system is under high pressure, and even the low side will be way higher than atmospheric pressure, so I would imagine that the refrigerant simply 'pushes' up against the air in the AC MGS hoses and keeps it from actually being sucked into the system
  • AC compressor keeps cycling every 5 secs
    If the car is out of warranty, you will end up taking it to a first class AC repair shop Fixing a 1234yf system is rather beyond the capability of a do-it-yourself project The exact amount of refrigerant must be weighed in, to the ounce, else it will just not work correctly Be sure the shop has MACS certified signs
  • AC compressor leaking after change it - Automotive Air Conditioning . . .
    I replaced 3 times my AC compressor, vacuum test is good I'm recharging while the car is running and the AC is ON, just after half can refrigerant the compressor starts leaking in the bearing or axle All compressors happened the same problem The AC works good, but every time is leaking, and I will replace for the 4th time
  • Ac low pressure side is high and high pressure side is low
    I went to check if the compressor turns on and I noticed as soon as I turn on the AC it will blow cold air for about 1 minute and then the compressor starts to cycle on and off It turns on for about 2 seconds and turns off and the car shakes Then it does the same thing again until I turn off the AC or the car





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