To turn the compressor off, we have to unplug the unit. I have 2 units and both are experiencing this problem.
A sensor tube ( looks like a wire ) in front, at air inlet, is the temperature sensor and many times this sensor is poorly cared for and even broken off by people. It's my guess, this sensor may be the problem for it controls compressor cycling on and off.
If you have the temperature set too low and the unit can never reach that temperature it will never shut off. Need to match the unit room size to the unit to make sure it's even possible to reach that temperature
SOURCE: maytag window ac unit
Feel the motor and see if hes hot ...... spin the fan by hand and see if it spins freely if not the bearings have seized up. So either rebuild the fan motor simply by replacing the bearings and oiling them and that should fix your problem. IF the fan spins freely OHM out the fan and make sure there is no shorts or openings in the fan. if your fan motor checks out good both mechanically and electrically then your next step is to check the capacitor and control board
SOURCE: 2 problems.. AC Comp cuts out. And Fan will not stop.
Unit#2 -Sounds like the contacts on the master switch are welded closed or the switch is broken, Replacing the switch should fix this unit.
#1 is a little more difficult to diagnose. The compressor is being taken off line by a circuit that protects the compressor from damage either; 1- liquid refrigerant getting back to the compressor which can be caused by something as simple as a clogged return air filter or evaporator coil on a heat pump or 2- overload situation caused by a bad condenser motor or a clogged condenser coil. The first thing you need to do is clean both coils and replace the filter,. Then check to be sure your getting good airflow across both coils. I think it's most likely an airflow issue I hope this resolves the problem GL!
SOURCE: constantly running
follow the wires from compressor to contactor or relay contacts stuck replace
SOURCE: Central air running all day and not cooling very well
Condensation by the compressor is okay, but if you see it icing up thats reason for concern. The indoor coils can freeze up if there is not enough air flow. Make sure most if not all the registers are open. Take tempature readings at the return and at a supply vent. There should be a 20-28 degree difference. If the difference is only in the teens you have a functional problem. Be sure to shade direct sunlight. And if it gets below 65 degrees at night be aware that if the A\C runs through the night it may block up with ice in the evaporative area. If outside temp reaches 100 degrees unit will run all day. Good luck
Relay in controller stuck closed. new controller required - may be a pcb type that can be fixed with a new relay
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