While originally configured for 3

opening only upon receiving a 24-volt signal from the thermostat or integrated control board

including FBD

Fabricated with durable metal "tablock" construction

this cold end header box acts as the central recovery point for acidic condensate produced during the combustion process

Lennox 10M66 Limit Switch 323269-701 While originally configured for 3The Lennox 10M66 Limit Switch is a critical safety component engineered for precise thermal monitoring in high efficiency gas furnaces and air handlers. For technicians diagnosing a Lennox furnace limit switch opening prematurely or failing to reset, this SPST (Single Pole Single Throw) thermal sensor provides the exact calibration required for OEM compliance and system safety. Operating on a normally closed circuit, the 10M66 is designed to break the