Replacing a/c low pressure switch
- Thread starter doctordon
- Start date
Probably not, but I don't really know.
Since the switch needs to sense the pressure in the system, it has to have some sort of access port to read that pressure.
Are you sure you need a new low pressure switch?
It might just be doing its job because of low refrigerant charge in the system.
Low refrigerant will result in low operating pressure and the low pressure switch will open to keep the compressor from running and creating even more problems.
>> Handle refrigerants with care,They can cause severe skin and eye damage because of their low temperature when allowed to escape into the atmosphere.
Since the switch needs to sense the pressure in the system, it has to have some sort of access port to read that pressure.
Are you sure you need a new low pressure switch?
It might just be doing its job because of low refrigerant charge in the system.
Low refrigerant will result in low operating pressure and the low pressure switch will open to keep the compressor from running and creating even more problems.
>> Handle refrigerants with care,They can cause severe skin and eye damage because of their low temperature when allowed to escape into the atmosphere.
Hi Charles,
I'm pretty sure it's the switch. If I tap on the switch with a small hand tool the compressor kicks in. It will run great for a short time (5-15 minutes; sometimes longer) then the compressor kicks off and if I tap the switch again it starts back up.
Once the compressor clutch was engaged I checked the charge with gauges. Pressure is within specifications.
I'm pretty sure it's the switch. If I tap on the switch with a small hand tool the compressor kicks in. It will run great for a short time (5-15 minutes; sometimes longer) then the compressor kicks off and if I tap the switch again it starts back up.
Once the compressor clutch was engaged I checked the charge with gauges. Pressure is within specifications.
atkinsonair
Official Wax Waster
Just unhook the wires and unscrew it, you only lose a a little spit of refrigerant. Did you know freon is a brand name, by dupont.
GearHead_1
Long Time Member
Pretty sure that switch uses a Schrader type valve. Shouldn't have to evacuate the system for a direct replacement.
Hey - Thanks to all who responded. I replaced the switch today and all is well.
As atkinsonair said only a spit of refrigerant came out. I know many people in other parts of the US are freezing now but it's in the low 80's here in Florida and I'm glad to have the AC working again.
Thanks again!
As atkinsonair said only a spit of refrigerant came out. I know many people in other parts of the US are freezing now but it's in the low 80's here in Florida and I'm glad to have the AC working again.
Thanks again!