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Central Air Conditioner Troubleshooting

The day your cooling system malfunctions is often the day you need it most. That’s why it’s important to follow Trane’s recommended air conditioning maintenance tips, so potential problems are avoided before they become more serious. If your A/C system has stopped working, use our troubleshooting guide below to help determine the problem.

No air movement

While the air conditioning unit cools the air, your system's fan or air handler moves it through the house. Check to make sure that the air conditioner is on and operational, and if you're not getting air flow, check out our air handler troubleshooting guide. If your air conditioner does not seem to be functioning at all, check for a tripped breaker.

No cold air

There are a few potential causes if air is moving through your home, but not cooling down. Dust and debris could build up on the evaporator, making heat exchange less efficient. Use our air conditioner maintenance guide for tips on how to clean the evaporator. Check to make sure both the inside and outside units are working, and that the thermostat is set at the desired temperature. If the problem still isn't clear, contact a Trane Comfort Specialist.

Drain pan overflowing

The drain pan below your interior air conditioning unit collects condensation, and an electric pump usually moves the water to a nearby drainage pipe. If the pan is overflowing, check for a kink or block in the drainage line, and make sure that the pump is plugged in and working.

System running constantly

If your air conditioner seems to be running constantly, your thermostat could be set too high. Reset your thermostat, then adjust the temperature to a comfortable level. If the unit is still running continuously, contact a Trane Comfort Specialist.

Contact an air conditioner troubleshooting pro

If the issue can't be determined based on this guide, contact your local Trane Comfort Specialist. They'll be able to diagnose the problem and get your air conditioner running properly, so you and your family stay cool and comfortable.

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