You can bypass the AC low pressure switch, on your Toyota Corolla, by removing the switch. You can remove the wiring to the switch and leave the switch and place.
You do not want it to run on low freon as it will burn itself up. There is a low pressue switch that tells it not to run if the freon pressure is below a certain point. To make it run; add freon.
Low on freon, faulty pressure switch, faulty clutch. Jumper the low pressure switch with a paperclip (can running, AC on), if the clutch cycles, it's either low on freon, or the low pressure switch is bad.
Either low on freon or the low pressure switch is bad. You are gonna have to put a set of gauges on it. Usually this happens when the freon leaks out of the system. If there is not enough freon in the system, the low pressure switch keeps the compressor from coming on and being burned up.
Most common problem LOW FREON
Could be low on freon,
It should not run with no freon. There is a low pressure switch to keep that from happening.
Most likely the freon is low, however the low pressure cutout switch could be bad. If it is the cutout switch, the a/c will probably be erratic. The switch cuts out when the low side freon pressure falls to 20 PSIG or below.
check to see if you have enough low side freon pressure and/or if the low pressure switch is working. bypass switch by crossing the wires of the switch with a paperclip to apply trigger voltage to the coil on the compressor,also check to see if there is voltage going to the low pressure switch,if these measures don't work,disconnect the high pressure switch to see if that switch is stuck and shutting off power thru the relay.
Low freon
Not without some specialized equipment. Any good A/C repair shop can remove the Freon, replace the switch, and install the same Freon again, thus loosing none.
Low Freon - Your AC system has a leak .The low pressure switch is working.