Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpHaier A/C RepairHaier Air conditioner won't turn off Repair
Haier Air conditioner won't turn off
If your Haier air conditioner won’t turn off, the unit is usually either struggling to satisfy the temperature setting or a control part is keeping the compressor energized. Start with the most likely cause: dirty condenser coils. When the coils can’t release heat, the air conditioner keeps running and the compressor may run continuously trying to cool the room. Next, check the temperature control thermostat or thermostat, which can short or fail and send constant voltage to the fan motor and compressor. A dirty or damaged air filter can also restrict airflow enough that the AC runs continuously because the room never reaches the set temperature. If those parts check out, the thermistor may be sending the wrong room-temperature signal to the control board, causing the air conditioner compressor to keep running. A relay board can also stick and provide continuous voltage, but it is less common and should be checked after the simpler causes. Enter your Haier model number on RepairClinic.com to find the exact replacement part that fits 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 - Haier 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.)
Enter model number to search for the required part specific to your product
Highly Likely
03 - Haier 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 - Haier 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 - Haier 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 Haier air conditioner turn off?
Why is my Haier AC compressor running constantly?
Can a dirty air filter make a Haier air conditioner keep running?
How do I know if my Haier air conditioner thermostat or thermistor is bad?
Should I replace the relay board if my Haier air conditioner keeps running?
How do I find the right replacement part for a Haier air conditioner that won't turn off?
Shop by Haier Air Conditioner Parts
Shop by Popular Haier Air Conditioner Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com