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HomeRepair HelpGarrison Central A/C RepairGarrison Central air conditioner - home's humidity is too high Repair
Garrison Central air conditioner - home's humidity is too high
When your Garrison central air conditioner leaves the home humid, the system may be running without properly removing moisture. When your house is humid with AC running, start with the air filter, the most likely cause. A clogged air filter restricts airflow, reduces cooling capacity, and can cause the evaporator coil to frost over, preventing the air conditioner from dehumidifying. Replace the filter at least twice a year, or more often in dusty homes or homes with pets. Next, check the condenser coils for dirt and debris. Dirty coils cannot release heat efficiently, which can make the compressor run continuously while the AC still fails to lower humidity. A defective temperature control thermostat may shut the system off too soon, while a failed thermistor can send incorrect temperature information to the control board. The control board is less common and should be checked only after these parts. Turn off power before inspecting or replacing parts, and do not work inside the 240-volt condensing unit unless qualified. Refrigerant or sealed-system repairs require an EPA 608-certified HVAC technician. Enter your model number to find the exact replacement air filter, thermostat, thermistor, or control board for your Garrison air conditioner.
01 - Garrison Central 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. Check and replace the air filter at least twice a year, more often in dusty/dirty environments or if there is a pet in the home.
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Highly Likely
02 - Clogged Air Filter
If the air filter is clogged, air cannot flow properly through the home's venting system. This greatly reduces the cooling capacity of the air conditioner. In addition, if the air filter is clogged, the evaporator coils will frost over and not be able to remove moisture from the air. The air filter should be checked and replaced at least twice a year, more often in dusty/dirty environments. Refer to owner's manual for guidance.
Highly Likely
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 remove the moisture from the air and maintain the proper temperature, resulting in the compressor running 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.
Highly Likely
04 - Garrison Central 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 properly, the air conditioner may not stay running long enough to remove the moisture in the air and cool properly. To determine if the temperature control thermostat is defective, use a multimeter to test it for continuity. If the thermostat does not have continuity, or is shutting off too soon, replace it. (Note: Some thermostats may also control a heater and, as a result, will have three...
Common
05 - Garrison Central 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.)
Less Common
06 - Garrison Central Air Conditioner Control Board
The main 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.
Less Common
Frequently Asked Questions
Why is my home humid with the central air conditioner running?
Can a dirty air filter or condenser coil cause my central air conditioner not to cool properly?
What should I do if my AC coil is freezing up or my air conditioner is not removing humidity?
How do I test the thermostat or thermistor when my central air has poor temperature control?
How do I find the correct Garrison central air conditioner part?
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