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HomeRepair HelpTrane Central A/C RepairTrane Central air conditioner has poor temperature control Repair
Trane Central air conditioner has poor temperature control
Is your Trane central air conditioner showing poor temperature control, uneven cooling in the house, or AC temperature swings? Start with the air filter, the most likely cause. A clogged filter restricts airflow through the furnace or air handler, reduces cooling capacity, and can cause the evaporator coil to frost over. Replace the filter as directed, especially in dusty homes or homes with pets. Next, check the wall thermostat. Failed electrical contacts can prevent the furnace or air handler and condensing unit from operating correctly or can cause intermittent cooling. A qualified DIYer can test thermostat continuity with a multimeter and replace a defective thermostat. Blocked or leaking vents can also cause weak airflow and rooms with different temperatures, so inspect the ductwork and registers. Finally, an oversized Trane air conditioner may cool quickly and shut off before air circulates evenly, causing poor temperature control. Enter your model number to find the exact replacement air filter, thermostat, or other part for your Trane system. Turn off power before service; repairs involving 240V wiring or sealed-system refrigerant work require a licensed HVAC technician and EPA 608 certification.
01 - Trane Central Air Conditioner Air Filter
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. A clogged air filter will greatly reduce the air flow of the furnace or air handler which can result in poor temperature control when trying to heat or cool the home.
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Highly Likely
02 - Trane Central Air Conditioner Wall Thermostat
The wall thermostat has electrical contacts that control the power supply to the furnace or air handler and condensing unit. If the contacts in the thermostat fail, certain components of the cooling system may not work or may only work intermittently. To determine if the thermostat is defective, use a multimeter to test it for continuity. If the wall thermostat does not show proper continuity, replace it.
Common
03 - Trane Central Air Conditioner Wifi Thermostat
The WiFi thermostat has electrical contacts that control the power supply to the furnace or air handler and condensing unit . If the contacts in the thermostat fail, certain components of the cooling system may not work or may only work intermittently. To determine if the thermostat is defective, use a multimeter to test it for continuity. If the WiFi thermostat does not show proper continuity, replace it.
Common
04 - 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.
Less Common
05 - Blocked or leaking vents
The furnace or air handler must have good airflow to work properly. A blocked or leaking vent can prevent good air flow and cause inconsistent room temperatures.
Less Common
06 - Oversized air conditioner
An oversized furnace or air handler will quickly heat or cool the home and shut off. This causes acceptable temperatures in certain areas but not in others. The circulated air needs time to distribute evenly throughout the home; the air recirculating through the furnace or air handler for longer periods of time will produce better results.
Less Common
Frequently Asked Questions
Why is my Trane central air conditioner not holding temperature?
Can a clogged air filter cause poor temperature control or weak airflow from AC vents?
How do I know if my Trane thermostat is causing uneven cooling?
What should I check before replacing an expensive Trane AC part?
How do I find the correct Trane central air conditioner replacement part?
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