Start adding, once you get enough pressure to be over the safety low pressure switch it will come on so you can fill it completely. The switch is put in there to prevent the compressor from coming on when no refrigerant is presesnt and ruining the unit. You might want to find out why you are so low on freon before filling it up again.
To service a stuck Hermetic compressor,repair the start components of the air conditioning compressors.
go ahead and start charging the ac. make sure you have the car running and the air conditioning on as cold as the car can get. once a certain amount of refrigerent has collected in the lines the compresser should start working
DISCONECT THE BATTERIE CABLE FOR 10 MINUTES ,AFTER YOU RECONNECT THE BATTERI YOU CAN CHARGE THE AC. COMPRESSOR
Most all cars and trucks started in late 1992 to 1993 but everything was R134a in 1994...
Low refrigerant causing compressor not to start?
Jump the compressor relay next to the fuse panel under the hood. Pull the relay out and use a piece of wire to jump the contacts. Compressor will engage, with the engine running fill with your 134a.
If its just the compressor that's not starting then it could be bad contactor bad capacitor burnt or broken wire bad compressor lower than normal line voltage If you are not comfortable testing or working with electricity then don't attempt this on your own
I would start with the basics and look for a blown fuse - there should be a fuse for the air conditioning switches , A/C compressor clutch
with the compressor running.
1939 Packard Motor Car Company markets an automobile with air conditioning offered as an option for $274. The refrigeration compressor runs off the engine, and the system has no thermostat. It discharges the cooled air from the back of the car.
Most likely, your air conditioning compressor is cooked or its pulley clutch has seized. Hopefully it was the pulley, because the compressor is not cheap.
I don't know exactly where it is but i know how to find it.. start at the ac compressor and follow thew lines back and on one it will have a little piece that will shoot up and it will have a black cap on it that should be the one