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the orfice has been replaced.we installed new temp sensor and found out that the engine was actually running hot.radiator appeared to be blocked-the top tank was hot,the bottom was cold.new radiator later-still have hot running problem which is cutting off ac when temp climbs.the orfice has been replaced.we installed new temp sensor and found out that the engine was actually running hot.radiator appeared to be blocked-the top tank was hot,the bottom was cold.new radiator later-still have hot running problem which is cutting off ac when temp climbs.
we finally found a faulty temp sensor switch which showed normal temp at the guage.after replacing this sensor the guage started to read correctly and we found we did indeed have an overheating problem which kicked the compressor out at about 220 degrees.we found a faulty thermostat and after replacing the thermostat the a/c worked fine.we finally found a faulty temp sensor switch which showed normal temp at the guage.after replacing this sensor the guage started to read correctly and we found we did indeed have an overheating problem which kicked the compressor out at about 220 degrees.we found a faulty thermostat and after replacing the thermostat the a/c worked fine.
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Have a pressure test performed using the radiator to see if you have any leaks on the water cooling part of your engine.This is going to take a little while.Lets try.It certainly would be a lot easier if I had the car in my care.However let try.Have a pressure test performed using the radiator to see if you have any leaks on the water cooling part of your engine.This is going to take a little while.Lets try.It certainly would be a lot easier if I had the car in my care.However let try.
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if you are asking about the high pressure cut off switch; it would either be insatlled on the compressor itself or on the high side pressure line ussuallly in route to the condensor (looks like second radiator)....
HIGH PRESSURE CUTOFF SWITCH LOCATED ON AC COMPRESSOR DISCHARGE LINE LEADING TO THE CONDENSOR.THE HIGH PRESSURE CUTOFF SWITCH WILL CUT OFF THE AC COMPRESSOR IF SYSTEM PRESSURE RISES TO HIGH CAUSED BY RESTRICTION IN THE REFRIGERANT CIRCUIT OR OVERHEATED CONDENSOR.MAKE SURE COOLING FAN IS RUNNING WHEN THE AC SWITCH IS ON.THE COOLING FAN KEEP CONDENSOR COOL, IF COOLING FAN DONT RUN.YOUR AC WILL STOP BLOWING COLD AIR.HAVE THE REFRIGERANT SYSTEM CHECK OUT.MAKE SURE YOUR LOW SIDE PRESSURE IS 10 - 37 PSI. THE HIGH SIDE PRESSURE SHOULD BE 112 - 210 PSI. CHECK THE AC COMPRESSOR CLUTCH FUSE AND RELAY.
check the refrigerant level. The compressor is running until the low pressure or high pressure switch switch cuts it off.
Running the unit without enough refrigerant will damage the compressor because the lubricating oil is dissolved in the refrigerant. This is the reason for the low pressure switch cut off--to protect the compressor from damage.
If pressure gets too high, the compressor seals will blow. Thus the reason for the high pressure switch. Too much refrigerant or too much air in the system (due to a leak) will cause high pressures.
If refrigerant level appears to be correct, then suspect trapped air from a leak causing a high pressure cut-off. If refrigerant is low, suspect a leak causing a low pressure cut-off.
i have an f250 diesel. Same thing, shuts off after about 10 minutes and
comes on when it feels like it. Its not the cycling switch. I checked
the voltage at the compressor clutch and its 12v. I also, made a "new"
ground for the compressor. The black wire at the compressor is ground.
This didn't do anything, nor did checking the freon. It will also shut
off if you have run it for a while, turn the HVAC selector to off and
back on. Although it has power at the clutch (compressor) it didn't
come back on.. this is weird.. i think. I was sitting there trying to
figure it out and used my test like to "nudge" the clutch on the
compressor.. gave it a little "push start" and it came on again.. seems
it needs a new compressor? I will see what happens this weekend when i
try that. Also, the pressure and contamination switches, are open
circuits, that closed and predetermined settings, they are not tied into
the ground of the compressor, but "looped" thru the circuit.
Hello< will try and help you.Try replacing the low pressure switch,and the high side compressor cut out switch,look on the low side for the low pressure switch(large line/hose).It will have to wires gong to it.The high side cut out switch will be on the high side line/hose,or in the back of compressor.If this doesn`t help Have the system pressures checked.If I can help [email protected]
try cleaning condensor and radiator with pressue washer(be careful no to bend fins)may haft to remove grill if they are dirty will cause ecessive high pressure in system triggering high pressure switch thats why compressor shuts down-if it didnt system would blow line or damage compressor-try that if it works keep clean on regular basis!!!Best of Luck To You!!!!
sounds like your pressure switch is bad.as the temp outside gets hotter the more pressure is built up in your ac so when the pressure gets to high the pressure switch shuts down the system to prevent damage to it.Did u put any more r-134a in to the system if so then the pressure will be to high and the switch is doing as it is supposed to.Thanks for using fixya
This is just a suggestion but you should check to see if you have a thermostatic control switch in your evaporator this could be the cause if the intermittent problem.The switch is actually used tokeep your ac from freezing up i believe.
Check the cooling system, particularly the radiator to make sure it is not partially plugged. Additionally, check the radiator fan for proper operation. If the engine temperature is running way above normal, some of the heat is transferred to the air-conditioning condenser, which causes the air-conditioner to lose efficiency. As for your question about a "limiter" switch, there is a high-pressure switch in the air-conditioning system that cuts the compressor out when the pressure gets too high.
the orfice has been repalced
the orfice has been replaced.we installed new temp sensor and found out that the engine was actually running hot.radiator appeared to be blocked-the top tank was hot,the bottom was cold.new radiator later-still have hot running problem which is cutting off ac when temp climbs.
we finally found a faulty temp sensor switch which showed normal temp at the guage.after replacing this sensor the guage started to read correctly and we found we did indeed have an overheating problem which kicked the compressor out at about 220 degrees.we found a faulty thermostat and after replacing the thermostat the a/c worked fine.
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