Bryant communicating air conditioner (Evolution/Preferred series) shows code 41 on the indoor control or thermostat; outdoor fan does not run or runs erratically.

Safety first: Disconnect power at the outdoor disconnect and indoor breaker. The outdoor fan motor is high-voltage; do not work on live circuits.

Steps:

• 1. Inspect fan blade: Check for sticks, plastic, or wiring contacting the blade. Remove any obstructions and ensure the blade spins freely by hand.
• 2. Check motor harness: Locate the multi-pin connector from the ECM fan motor to the Bryant outdoor control board. With power off, unplug and inspect for corrosion, bent pins, or water intrusion. Clean and reseat firmly.
• 3. Visual motor inspection: Look for oil leakage, burnt smell, or discoloration on the motor housing. These signs indicate internal failure.
• 4. Restart and observe: Restore power and call for cooling. If the fan attempts to start then stops, or does not start at all while code 41 remains, the ECM motor or control board is likely defective.
• 5. Replacement: ECM motors are specific to Bryant models and require correct part numbers and sometimes programming. Replacement is best handled by a qualified technician.

Do not bypass: Never attempt to hard-wire the fan motor directly to line voltage; this can damage the motor and control board.