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My AC Won't Turn Off

If your AC won't turn off, you might not notice the irony of the situation right away. Then it dawns on you that you're freezing in the middle of summer and paying a lot of money for it. At least when the furnace broke last winter, you got cold for free. Maybe it's your window ac compressor not turning off or maybe your condenser coils are dirty. Luckily, Repair Clinic can help you figure out the problem so that you can fix an ac unit that runs constantly and does not shut off. We can show you how to do the repair yourself, and you might not even have to buy any new parts. Of course, you won't know for sure about the parts until you do a little troubleshooting, but you've come to the right place for that too.
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Common solutions for: Air conditioner won't turn off
Solution 1:
Condenser Coils are Dirty
The condenser coils dissipate the heat as the refrigerant passes through the coils. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. If the coils are significantly dirty, the air conditioner will not be able to maintain the proper temperature, and the compressor will run continuously in an attempt to cool the room. Check the condenser coils to determine if they are dirty. If the condenser coils are dirty, clean them.
Solution 2:
Temperature Control Thermostat
The temperature control thermostat provides voltage to the fan motor and compressor. If the thermostat has shorted out, it might send continuous voltage to the compressor and cause the compressor to r...un all the time. To determine if the thermostat is shorted out, use a multimeter to test it for continuity. If the thermostat has continuity all the time, this indicates that it is shorted out and should be replaced. (Note: Some thermostats may also control a heater and, as a result, will have three terminals. Refer to your air conditioner’s wiring diagram for more information.)
Required Part
Air Conditioner Temperature Control Thermostat
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Solution 3:
Thermostat
The thermostat monitors the temperature of the air. When the air temperature rises above a set point, the thermostat activates a switch to provide power to the fan and compressor. If the thermostat is... defective, it may cause the compressor to run continuously. To determine if the thermostat is defective, set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity. If the thermostat does not have continuity while the air conditioner is set to cooling, replace the thermostat. (Note: Some thermostats may also control a heater and, as a result, will have three terminals. Refer to your air conditioner’s wiring diagram for more information.)
Required Part
Air Conditioner Thermostat
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Solution 4:
Main Control Board
The main control board provides voltage to all of the components of the air conditioner. If there is a problem with the control board, it might not stop providing power to the compressor. Before you r...eplace the main control board, make sure you check more commonly defective parts. If you are certain that all of the other components are working properly, replace the main control board.
Required Part
Air Conditioner Main Control Board
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Solution 5:
Relay Board
The relay board provides voltage to many of the air conditioner components, including the fan motor and compressor. If there is a problem with the relay board, it might provide continuous voltage to t...he compressor. However, this is almost never the case. Before you replace the relay board, make sure you check more commonly defective parts. If you are certain that all of the other components are working properly, replace the relay board.
Required Part
Air Conditioner Relay Board
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Solution 6:
Temperature Control Board
The temperature control board provides voltage to the fan motor and compressor. If there is a problem with the control board, it might not stop providing power to the compressor. However, this is almo...st never the case. Before you replace the temperature control board, make sure you check more commonly defective parts. If you are certain that all of the other components are working properly, replace the temperature control board.
Required Part
Air Conditioner Temperature Control Board
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Solution 7:
Thermistor
The thermistor is a sensor which detects the room air temperature. It is connected to the control board. If the thermistor is defective it will not have continuity when it should. If this happens the ...compressor runs all the time.
Required Part
Air Conditioner Thermistor
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