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First, if the compressor doesn't run, it'll never get cold. You didn't say if it ran or not.
The defrost circuit is *designed* to cut the compressor out of the circuit during the 2 - 3 times (8 to 12 hour intervals) each day it goes into defrost mode. The compressor will remain off until the defrost temperature sensor (hidden in the freezer section) reaches 50 degrees (or so) *OR* for 20 to 25 minutes each time the defrost timer cycles on. If it is stuck in defrost mode because it failed to advance due to a bad clock motor or because of bad contacts, it will *prevent* the compressor circuit from ever being energized.
Check into this circuit and the location of this timer for your particular fridge. You should not need to worry about the defrost terminator, thermistor, sensor, heater or anything else in the *defrost circuit* at this time to get the compressor running.
Indoor sensor to sense the room temp and must cut off the compressor by working. If sensor defective, compressor will continuously running resulting to over cool in room. And also 23 C degree setting temp is best cooling for office and bed rooms. If for peculiar instrument which should be kept under low temp, can be set as mentioned temp (say 18 C or 16 C )<br />
Depends on if the ac is cutting off or if the air flow is changing. If the compressor is cutting off it could be a faulty relay or pressure switch - even the compressor clutch. Might be something with the radiator fan too. If the compressor is running and you get hot air, it could be a problem with a blend door under the dash.
Is the AC set on an energy saving mode. Together with this program if the thermostat is defective the same symtoms can appear. So please check on the thermostat and replace.
Since the compressor is cutting off the cooling does not take place to the extend that is set.
Possible that the relay or the compressor relay is switching off in load. If there is cooling onthe compressor but cuts off without a reason then shcek if the thermostat is kep tlow to let the trigger cut off. set a temp just above the room temperature.If the compressor holds on till the set temp is reached the thermostat is working fine. otherwise the thermostat may be givng the srong signal so that the compressor is not swittched on.
You can bypass the relay drive to switch on the compressor to chech this circuit. If so get the auto circuit corrected.
there is a thermistor switch located in evaporator case(thin black single or 2 wires) that makes the compressor cut in and out (cycle) it monitors evaporator temperature.
check head pressures with air cond charging station or gauge set and monitor pressure on high and low side (150-200kpa on low, 1500-1800kpa on high good average depending on ambient temp) if it is low on gas due to leak this can also keep compressor running longer due to evaporator temp not reaching lowest threshhold to cut compressor out
i dont think so i would look at the compressor kicking out on thermal overload or a faulty thermostat thermostats have two settings cut in cut out your cut in could be bad and not turning the compressor on till the temp reaches melting temps now if your hearing a click buzz then you need to look at the compressor and make sure the compressor fan is running but its not a defrost promblem
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