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 HelpColeman A/C RepairColeman Air conditioner not cooling Repair
Coleman Air conditioner not cooling
If your Coleman air conditioner is not cooling, start with the simple airflow checks before assuming a major sealed-system problem. A clogged air filter is the most likely cause because it restricts airflow, reduces cooling capacity, and can make the evaporator coil frost over. If the filter is clean, the user control and display board may not be letting the unit set or hold the right cooling temperature, especially if the thermistor tests properly. Dirty condenser coils are another common reason for an AC not cooling or an air conditioner blowing warm air, since built-up debris prevents the coils from releasing heat and 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 should be checked only after the overload and capacitor are ruled out. A faulty thermistor can also cause poor cooling by sending the wrong temperature reading to the control board. Enter your Coleman model number on RepairClinic.com to find the exact replacement air filter, capacitor, thermistor, control board, or other part for your specific air conditioner.
01 - Coleman 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.
Enter model number to search for the required part specific to your product
Top Solution
02 - Coleman 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.
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 - Coleman 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 - Coleman 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 - Coleman Air Conditioner Thermistor
The thermistor is a sensor connected to the control board that detects the temperature of the air. The resistance value of the thermistor changes in conjunction with the air temperature. If the air temperature rises, the resistance value will decrease. To determine if the thermistor is at fault, use a multimeter to test it for continuity. If the thermistor does not have continuity, or if the resistance of the thermistor does not change with a change in temperature, replace the thermistor. (To find specific temperature and resistance values, try checking your user’s manual.)
Common
Frequently Asked Questions
Why is my Coleman air conditioner not cooling?
What should I check if my Coleman AC is blowing warm air?
Can a dirty air filter make a Coleman air conditioner freeze up and stop cooling?
Why does my Coleman air conditioner keep running but not cool the room?
How do I find the right replacement part for my Coleman air conditioner?
Shop by Coleman Air Conditioner Parts
Shop by Popular Coleman 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