OEM Lennox Door Switch Cover — 62K72 (LB-66412)

The Lennox 62K72 (LB-66412) door switch cover is a factory safety component that shields the blower compartment door interlock switch on Lennox furnaces and air handlers. The door switch it protects cuts power to the blower and burner whenever the access panel is removed, and this cover keeps the switch properly positioned and insulated so the interlock engages every time the panel is reinstalled.

Common failure symptoms: A cracked, missing, or misaligned cover can let the door switch bind, stick, or fail to make contact — leading to a blower that won't start, a furnace that shuts down intermittently, or a unit that runs with the panel off when it shouldn't. If your system quits the moment the access door is opened or won't run with the panel secured, the switch assembly and its cover are worth inspecting.

Why OEM matters: This is a genuine Lennox 62K72 part built to the exact dimensions and tolerances of the original assembly. Generic substitutes may not seat correctly against the switch, defeating the safety interlock it's designed to guarantee. Choosing the OEM cover ensures a precise fit, reliable operation, and full compatibility with your Lennox equipment. In stock and ships same day.