Safety: Turn OFF power at the breaker before opening the indoor unit.

Step 1 – Listen for fan: When you turn the unit ON, check if you hear the indoor fan start. If the louvers move but no airflow is felt, the fan motor may be faulty.
Step 2 – Access fan motor: Remove the front cover, filter, and lower housing to expose the blower wheel and motor. Inspect for obstructions (plastic, insulation) preventing rotation.
Step 3 – Check wiring: Locate the multi-pin connector from the fan motor to the indoor PCB. Reseat the connector and inspect for corrosion or burnt pins.
Step 4 – Spin test: With power OFF, spin the blower wheel by hand. It should rotate freely without grinding. If stiff, the motor bearings may be seized.
Step 5 – Replace motor: If E6 persists and the fan does not run, replace the indoor DC fan motor assembly with a Carrier-compatible part. Transfer the blower wheel carefully and balance it properly.
Step 6 – PCB check: If a new motor does not resolve E6, the indoor PCB fan driver circuit may be defective and should be replaced.

Indoor unit shows E6 and system does not respond to cooling commands

Possible Causes