Code 14 — Furnace Ignition Lockout

What does 14 mean?

This fault indicates that the furnace has failed to ignite after multiple attempts and has entered a lockout state. This is a safety measure to prevent gas buildup.

• No gas supply to the furnace
• Dirty or faulty igniter
• Flame sensor issue (dirty or failing)
• Blocked flue or exhaust vent
• Insufficient airflow

Click steps to track your progress.

1. 1

   Verify that the gas supply valve to the furnace is fully open.

2. 2

   Check if other gas appliances in your home are working to ensure gas service is active.

3. 3

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

4. 4

   If the problem continues, contact a qualified HVAC technician to inspect the ignition system.