Recharging the AC
#21
Registered User
iTrader: (8)
if its sitting at 100 while the car is running and ac turned on then you must relieve the pressure. constant high pressure will eventually cause the clutches to fail on the compressor.
*note*, when refilling r134-a, the can should be in the UPSIDE DOWN position. the reason is you want it to enter the system in liquid form not in gas form. you will get a colder charge and lower psi readings this way.
*note*, when refilling r134-a, the can should be in the UPSIDE DOWN position. the reason is you want it to enter the system in liquid form not in gas form. you will get a colder charge and lower psi readings this way.
#24
New Member
Unless you have an A/C manifold gauge, an A/C vacuum pump and a refrigerant recovery tank, don't do this at home. Just pay the $100 and get a professional to inspect and re-charge your A/C system.
#26
New Member
iTrader: (15)
How is it that no one has mentioned that AC systems are charged by WEIGHT not by pressure, and the refrigerant capacity is conveniently one bottle of refrigerant. Not even in the FSM does it mentioning servicing the AC charge via pressure. It can be used to diagnose other things, but the charge is determined by weight not pressure.
Proper procedure is always to vacuum the system down into a recovery tank using a pump and manifold, then recharging with refrigerant by weight
Proper procedure is always to vacuum the system down into a recovery tank using a pump and manifold, then recharging with refrigerant by weight
#27
Registered User
iTrader: (15)
I have, in other threads, and I'm sure lots of damage has been done (along with poor performance) by guys servicing their A/C without following proper procedures. It's encouraged, though. by the auto parts stores selling recharge kits that make the task too easy. At the very least, an open system should have its leaks repaired and be vacuumed down before any charge is installed.
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