Lennox Furnace Control Board Services

SureLight control boards are prone to power supply issues, relay failures, and diagnostic LED problems. We provide complete board replacement with OEM Lennox parts.

• Power supply component failure
• Relay and contactor issues
• LED diagnostic light malfunctions

Lennox furnaces with faulty ignition control circuits fail to light or experience delayed ignition. Professional diagnosis required.

• Hot surface igniter control failure
• Gas valve timing issues
• Ignition sequence lockouts

Control board communication failures with thermostat systems, especially with Lennox iComfort and ComfortSense thermostats.

• R, C, Y, W wire terminal failures
• Digital communication bus errors
• No power to thermostat

Control board failures affecting blower motor operation, including variable speed control and timing problems.

• Blower won't start or stop
• Variable speed motor control failure
• Blower timing and delay problems