Chuck Reynolds
Member
All,
Put in new lines through cab and some under cab 3 years ago. Also, new expansion valve and dryer. Vacuumed and put in 134a. At same time a thermal switch. Has been working fine for 3 yrs till recently and now the compressor will not kick on.
Not having gauges on hand I tried adding 1 small can r134a from walmart from just the pressure in can. . Still no luck with compressor coming on. That was attempted with tractor running and cab fan and cab ac switch on. Also, had the compressor manual valve open for low side.
Have checked continuity between b and c on thermal switch and it has continuity. Tried a new spare thermal switch and it did not start compressor either.
With key on, fan on, and ac switch in cab on there is 12 volts showing as coming in to middle c wire where thermal switch plugs in.
I tested compressor clutch by jumping to battery and it comes on.
Took a gamble and added 1 can of freon by jumping clutch to battery. Then shut manual low side valve. Then put thermal fuse back in. Compressor still does not kick on.
Question: could these be 2 bad thermal switches showing good continuity between b and c?
ANY GUIDANCE WOULD BE APPRECIATED.
Put in new lines through cab and some under cab 3 years ago. Also, new expansion valve and dryer. Vacuumed and put in 134a. At same time a thermal switch. Has been working fine for 3 yrs till recently and now the compressor will not kick on.
Not having gauges on hand I tried adding 1 small can r134a from walmart from just the pressure in can. . Still no luck with compressor coming on. That was attempted with tractor running and cab fan and cab ac switch on. Also, had the compressor manual valve open for low side.
Have checked continuity between b and c on thermal switch and it has continuity. Tried a new spare thermal switch and it did not start compressor either.
With key on, fan on, and ac switch in cab on there is 12 volts showing as coming in to middle c wire where thermal switch plugs in.
I tested compressor clutch by jumping to battery and it comes on.
Took a gamble and added 1 can of freon by jumping clutch to battery. Then shut manual low side valve. Then put thermal fuse back in. Compressor still does not kick on.
Question: could these be 2 bad thermal switches showing good continuity between b and c?
ANY GUIDANCE WOULD BE APPRECIATED.