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HomeRepair HelpKelvinator A/C RepairKelvinator Air conditioner won't turn off Repair
Kelvinator Air conditioner won't turn off
If your Kelvinator air conditioner won’t turn off, the unit is usually working too hard to satisfy the temperature setting or a control part is sending power when it shouldn’t. Start with the most likely cause: dirty condenser coils. When the coils are packed with dust or debris, they can’t release heat properly, so the AC runs continuously and the compressor may keep running constantly trying to cool the room. Next, check the temperature control thermostat, which can short and send continuous voltage to the fan motor and compressor. A defective thermostat can cause the same problem by failing to sense or switch correctly. A dirty or damaged air filter can also reduce airflow enough that the air conditioner keeps running longer than normal. Less common causes include a failed thermistor feeding bad temperature information to the control board, or a relay board stuck supplying voltage to the compressor. Once you’ve narrowed down the part, enter your Kelvinator model number on RepairClinic.com to find the exact replacement condenser coil-related parts, air filter, thermostat, thermistor, or relay board for your specific air conditioner.
01 - 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. Refer to owner's manual for cleaning instructions.
Top Solution
02 - Kelvinator Air Conditioner 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 run 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.)
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Highly Likely
03 - Kelvinator Air Conditioner 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...
Highly Likely
04 - Dirty or Damaged Air Filter
A dirty air filter will greatly reduce the cooling capacity of the air conditioner, which may cause the unit to run longer than normal. Most air filters used in stand-alone air conditioners can be cleaned with soap and water. Only filters that are extremely clogged with debris or damaged will need to be replaced. Refer to owner's manual for guidance.
Common
05 - Kelvinator Air Conditioner 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.
Common
06 - Kelvinator Air Conditioner 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 the 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.
Common
Frequently Asked Questions
Why won't my Kelvinator air conditioner turn off?
Why is my Kelvinator AC compressor running constantly?
Can a dirty air filter make my air conditioner keep running?
How do I know if my Kelvinator air conditioner has a thermostat or thermistor problem?
How do I find the right Kelvinator air conditioner thermostat or thermistor replacement?
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