Lennox Furnace Error Code E200: How to Fix It

Q: What causes Lennox E200 error code?

E200 indicates a hard lockout caused by control board failure, which can result from power surges, component aging, moisture damage, or repeated safety shutdowns that damaged the control circuitry.

Q: Can I reset Lennox E200 error myself?

While you can attempt a system reset, E200 hard lockout typically requires control board replacement. A temporary reset may work briefly, but the error will likely return until the control board is replaced.

Q: How much does Lennox control board replacement cost?

Control board replacement typically costs $400-800 including parts and labor. The control board itself costs $200-400, with installation adding $200-400 depending on your location and technician rates.

Q: Is Lennox E200 covered under warranty?

Many Lennox furnaces include 5-10 year parts warranties that may cover control board defects. Check your warranty documentation or contact Lennox customer service to verify coverage before paying for repairs.

Q: How long does control board replacement take?

Professional control board replacement typically takes 2-4 hours, including system testing and calibration. The technician must ensure all safety systems function properly before completing the repair.

Abstract

Lennox E200 error code indicates a hard lockout condition that requires complete control board replacement. This critical error means the furnace control system has detected a serious safety issue and has permanently shut down operations until the control board is replaced by a qualified technician.