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when you fit a compressor . after vacuuming the system for about an hour, you connect the gas up to the suction port and let the gas in
with the engine running and the ac switched on , when there is enough in the system the low pressure switch is turned on and the compressor starts to run sucking in more gas
The system is charged according to pressure gauges and not by the number of cans
now you are doing several things wrong
1-- there are 2 types of gas and if you used a wrong replacement unit , it will not handle the high pressures of the different gas
2-- if you used the no of cans method -- then liquid freon gets to the pistons in the compressor and hydraulic locks the system resulting in the destruction you describe
3--- did you put oil in the compressor before fitting it
as the oil circulates with the gas and there was no oil i the replacement compressor , then the plate runs dry and seizes , again causing destruction
the best method is to get an accredited ac professional to do the job or it will cost you more money
If the clutch comes on,but turns off to soon,you probably have a low charge.There are many do-it-yourself charging kits at part stores to charge it up.It is also possible the system is overcharged,but this would only be the case if there was recent service done.
You need to have the refrigerant charge level checked, it sounds like it is low. You Need a set of AC pressure gauges to do this testing. If the system has a low charge the pressures will be very low in the low side testing port.
You must have a leak, the compressor will not run if the system is low on charge, the charge carries the oil to lube the parts of the system. Also do an electrical jumper of the compressor cycling/pressure sensing switch.
The AC compressor does not have to be running to charge the AC system, and the low pressure switch will even prevent the AC compressor from operating until there is sufficient pressure to operate the AC compressor without damaging it.
Start the engine and turn on the AC, then charge the system with the R-134a and as soon as there is enough pressure built up to trip the low pressure switch off, the AC compressor clutch should then engage and then finish charging the AC system.
If your AC system is otherwise operational, it may just need to be charged. The compressor will not come on unless there is sufficient charge/pressure in the system. So, first thing to check is the amount of charge in the system. You can purchase a gauge , similar to a tire gauge, that will give a reading of the system's charge. The gauge hooks up to the low pressure side ,or the larger diameter hose/line, same as where you place the re-charge hose. Again, if the system is operational, as you charge it, the compressor should kick in. At first, it will cycle on and off until the system reaches sufficient pressure.
Hope this helps...
From what you're describing, it sounds like the AC system needs a refrigerant charge.
Many car owners are doing their own AC
charge by purchasing a re-charge kit at the local auto parts store. A small gauge is also available (looks like a tire gauge) that attaches to the low side of the AC system, that gives you a reading of the system's charge.
The low side of the system is the larger metal hose line coming from the compressor. It has a fitting and cap on it. The high side is the smaller diameter metal hose.
turn the key to "on" and open the fuse panel to the left of the steering wheel when drivers door is open, hold the "reset" button until the oil light on the dash starts to blink and then push it again, you should hear the chimes and then the light will go off. :-)