Code 15 — Furnace Blower Lockout

What does 15 mean?

This fault signifies a lockout condition related to the furnace's blower operation. The system has detected an issue that prevents the blower from functioning correctly and has shut down.

• Blower motor failure or obstruction
• Control board malfunction
• Capacitor failure for the blower motor
• Wiring issues to the blower

Click steps to track your progress.

1. 1

   Ensure there are no obstructions around the outdoor unit or inside the indoor unit's blower area.

2. 2

   Turn off the power to the furnace at the circuit breaker for at least 30 seconds.

3. 3

   Restore power and listen for any unusual noises from the blower.

4. 4

   If the blower does not start or locks out again, contact a qualified HVAC technician.