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Air Handler Troubleshooting

Air handler not working? The following HVAC air handler troubleshooting guide can help identify the issue and potentially fix the problem, though professional service by a Trane Comfort Specialist as part of a scheduled air handler maintenance visit is highly recommended.

Trane air handler troubleshooting Guide

An air handler has many electrical and mechanical components that, without preventative maintenance, can degrade over time and reduce the unit's efficiency. If you notice reduced or no air flow throughout your home, you will want to check your air handler unit's air filter, evaporator coil, and blower motor for potential problems.

Dirty or clogged air filters

In order for your air handler to function properly, ensure that nothing obstructs the air flowing through your air handler unit. The most common obstruction is a dirty air filter. Cleaning or replacing your air filter regularly will not only improve the overall quality of your home's air, but also prevent more costly repairs later on. Many new digital programmable thermostats display air filter change reminders making it easier than ever to ensure consistent system maintenance.

Recommended Action: Examine the air filter in each of your system's components. If the filters looks dirty, clean or replace the filters as recommended in your use and care guide. If problem persists, contact your local Trane Comfort Specialist

Dirty or clogged evaporator coil

Another common issue Trane Comfort Specialists encounter is dirty or clogged evaporator coils. This happens when the system runs with no air filter. Without an air filter, components inside the air handler become clogged with dust and debris. This can cause evaporator coils to freeze, which reduces the unit's cooling capacity, and in some cases can force liquid refrigerant to return to the compressor.

Recommended Action: Check for signs of water below unit and cold exterior surface of indoor coil enclosure. Contact your local Trane Comfort Specialist. In the meantime, try turning your thermostat off for 1 to 3 hours to see if it will defrost.

Blower Motor Failure

Failure to use or replace an air filter can also cause the blower motor to quit. Excessive dust in the system makes the motor work harder, creating excess heat. As dust continues to build up, it can eventually cause the motor to burn out and require a replacement.

Recommended Action : If your blower motor fails contact a Trane Comfort Specialist. Failure of the blow motor will require professional service.

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