Want this question answered?
R134a
No, the 1994 Mercury Sable does not use R12 for recharging the A/C unit. The 1994 Mercury Sable uses R134a Freon.
R134a
The amount of Freon you will need to fill your 2001 Mercury Sable air conditioning system is dependent upon how low the Freon level is. A recharge kit will have a gauge to tell you when the system is full.
It takes R134a, which is the new EPA "standard" freon.
R134a freon............
R-12 unless it has been converted over to R-134a.
The only freon available is R134a. Your car most like came with R12. That means it will have to have the system evacuated at a shop, and then be converted to the R134a. Look at the fittings where the freon is to be introduced to the system....if they are screw on, then your car needs to be changed over to the newer refrigerant....if they are quick connects, you simply need to add R134a.
This is not a DIY job. It is illegal to release refrigerant into the atmosphere. Special equipment must be used to purge the system before removing and re-installing the compressor. The new compressor and system must then be charged correctly with refrigerant and oil. Take it to a professional.
Low pressure relay is bad! Check freon pressure, if it falls too low, the compressor will not run (installed for safet of compressor)
if you havent ever changed one before then you shouldn't mess with it, the freon inside the compressor is poisionest, it needs to be drained, new compressor installed, filled with dye to test for leaks, drained again and then re-fill with freon.
Check the Freon with a gauge. If the pressure is too high or too low then the system will not allow the compressor to run.