Trane
Insufficient Indoor Airflow
Trane air conditioner indoor blower runs but airflow from vents is weak.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Clogged filter, Dirty blower wheel, Collapsed or blocked duct, Blower motor running at wrong speed
How to Fix / Troubleshooting
Safety first: Turn off power to the indoor unit before opening panels or ducts.
- Filter: Replace the air filter.
- Blower cleaning: Remove the blower assembly if accessible and clean the wheel blades with a brush and vacuum.
- Duct inspection: Check accessible ducts for kinks, crushed sections, or closed dampers. Open any closed dampers.
- Speed tap: On PSC motors, verify the cooling speed tap is connected to the correct terminal on the Trane control board per the wiring diagram.
If airflow remains low, a technician should measure static pressure and adjust ductwork or blower settings.
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Repair Difficulty
Medium
3/5
Required Part
Trane Blower Wheel
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