Lennox Furnace Error Code E292: How to Fix It

Q: What causes Lennox error code E292?

E292 occurs when the flame sensor detects a flame while the gas valve is supposed to be closed. Common causes include a dirty or faulty flame sensor, a leaking gas valve, damaged wiring, or a malfunctioning control board.

Q: Is it safe to run my Lennox furnace with error E292?

No, do not operate the furnace with error E292. This is a safety-critical error that could indicate a gas leak or other dangerous condition. Shut off the furnace and gas supply immediately.

Q: How often should I clean my Lennox furnace flame sensor?

Clean the flame sensor annually as part of regular maintenance. If you experience frequent flame sensor issues, consider cleaning it every 6 months or having a professional inspect the system.

Q: Can a bad flame sensor cause error E292?

Yes, a corroded, damaged, or improperly positioned flame sensor can send false signals to the control board, triggering error E292. Cleaning or replacing the sensor often resolves the issue.

Q: When should I replace the flame sensor instead of cleaning it?

Replace the flame sensor if it's cracked, severely corroded beyond cleaning, or if cleaning doesn't resolve the E292 error. A sensor that repeatedly gets dirty quickly may also need replacement.

Abstract

Lennox furnace error code E292 indicates that the flame sensor is detecting a flame even when the gas valve is closed. This is a critical safety issue that can indicate a faulty flame sensor, gas valve leak, or control board malfunction.