When the air conditioner fails to shut down, the air inside the room becomes uncomfortable, and more electricity is wasted. Your unit may have malfunctioned, hindering it from shutting down as expected. If the air conditioner has failed to turn off, there could be several reasons behind it. Make sure you call a professional to diagnose the unit and fix the issue as soon as possible. The following are six reasons your air conditioner is not shutting down.
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With time, the thermostat may be damaged and lose its accuracy. This can disrupt how it communicates with the HVAC. If there is dirt buildup in the sensor, the thermostat may have a problem detecting the temperature in the room. Therefore, check if the thermostat is damaged. Damaged wires or loose connections could interfere with the thermostat, which may cause the system to run longer.
Clogged Air Filters
Air filters can clog with pollutants like dust and debris. This prevents the free flow of air through the air conditioner. When the unit is not getting quality airflow, the cooling unit strains to keep the temperature cool. Therefore, the unit will keep running to keep up with the pace. Ensure you clean the filters regularly to remove the dirt. You can also replace them with new HVAC filters to maintain their efficiency.
An air conditioner that won’t shut off could also result from an electrical problem. For instance, if the relay switch is stuck, the unit will keep getting power, meaning it continues to run. The contactor could be damaged, causing the switch to stick. You can easily fix the issue without the help of a professional. However, if you don’t know where to start, wait for the professionals to do their job.
A dirty condenser can also result in this problem. The outdoor condenser unit must be free of debris to ensure air flows properly and passes through the condenser coils. If there are leaves or dirt on the fins, there is not enough air passing through the unit, and heat is not transferred properly. Therefore, the air conditioner may continue to run.
Every air conditioner has a particular amount of refrigerant. The work of the refrigerant is to facilitate heat transfer throughout the system. If the refrigerant is low, it cannot absorb enough heat from the house. Therefore, the unit will continue running to lower the temperature.
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Frozen Evaporator Coils
The work of evaporator coils is to trap heat from the house. The heat is absorbed by the refrigerant in the unit and makes its way to the compressor and condenser before it is released to the outside. If the evaporator coils are frozen, it causes poor air movement, and the unit may freeze too.
These are six reasons why your air conditioner may fail to shut down. Ensure your unit is properly inspected and repaired by a licensed and certified technician. An issue with the thermostat, electrical issues, or the unit itself could cause this issue.