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HomeRepair HelpSharp A/C RepairSharp Air conditioner not cooling Repair
Sharp Air conditioner not cooling
If your Sharp air conditioner is not cooling, the fix often starts with airflow before moving into electrical parts. A clogged air filter can restrict air through the unit, reduce cooling capacity, and even cause the evaporator coil to frost over, so clean or replace the filter first. If the AC is not cooling after that, the user control and display board may not be allowing the unit to set or hold the right cooling temperature. Dirty condenser coils are another common reason for a Sharp air conditioner not getting cold because they cannot release heat efficiently, which can make the compressor run continuously. A failed dual run capacitor can keep the compressor or fan motor from running, while a bad compressor is possible but less common and should be handled by a licensed technician. A faulty thermistor can also cause a temperature control problem by sending the wrong air temperature reading to the control board. Enter your model number on RepairClinic.com to find the exact Sharp air conditioner replacement part that fits your unit.
01 - Sharp Air Conditioner User Control and Display Board
The user control and display board allows the user to operate the unit by selecting fan speeds and cooling temperatures. If the board is defective, it may not allow the unit to be set to a proper cooling temperature. If the temperature sensor or thermistor tests appropriately with a multimeter, it's possible the user control and display board is malfunctioning and will need to be replaced.
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Top Solution
02 - Sharp Air Conditioner Air Filter
If the air filter is clogged, air cannot flow properly through the air conditioner. This greatly reduces the cooling capacity of the air conditioner. In addition, if the air filter is clogged, the evaporator coils will frost over. 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.
Top Solution
03 - 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
04 - Sharp Air Conditioner Dual Run Capacitor
A dual run capacitor will power both the compressor and the fan motor. If the capacitor burns out, the compressor or fan motor will not run. To determine whether the capacitor is burned out, use a multimeter to test it for continuity. If the capacitor does not have continuity, replace it.
Highly Likely
05 - Sharp Air Conditioner Compressor
The compressor might be defective. However, this is not usually the case. Before replacing the compressor, be sure to check more commonly defective components—particularly the overload protector and the compressor capacitor. If the compressor is defective, it should only be replaced by a licensed technician.
Highly Likely
06 - Sharp Air Conditioner Temperature Control Thermostat
The temperature control thermostat is a sensor which monitors the temperature of the air and activates a switch to provide power to the fan and compressor when the air temperature drops below a set point. If the thermostat isn’t working, the air conditioner will cool continuously or won’t cool at all. To determine if the temperature control thermostat is defective, use a multimeter to test it for continuity. If the thermostat does not have continuity, replace it. (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...
Common
07 - Sharp Air Conditioner Control Board
The control board regulates the voltage to the compressor and the fan motor. If the control board fails, some components will not function properly or will not work at all. Control boards are often misdiagnosed; make sure to check more commonly defective parts first before replacing the control board.
Common
Frequently Asked Questions
Why is my Sharp air conditioner not cooling?
What should I check if my Sharp window air conditioner is blowing warm air?
Can a bad thermistor cause a Sharp AC not cooling problem?
Why does my Sharp air conditioner compressor run constantly but the room does not get cold?
How do I find the right Sharp air conditioner replacement part?