Lennox 63K46 Defrost Thermostat it serves as a fail-safe

it serves as a fail-safe against overheating conditions within the combustion chamber or flue collector

clear status signaling is essential for shortening service calls and preventing unnecessary downtime

but the igniter will fail to glow because the switch contacts remain open

Can this coil be used in outdoor applications

While the UV bulb is replaced annually

Lennox 63K46 Defrost Thermostat it serves as a fail-safeThe Lennox 63K46 Defrost Thermostat is a critical component for maintaining the operational reliability of Lennox heat pump systems. This OEM replacement part, also identified as 63K4601, is engineered with L70 28F temperature control characteristics, meaning it is designed to close at 28F on a temperature drop to initiate the defrost cycle and open at 70F on a temperature rise to terminate it. By accurately monitoring the evaporator coil temperature,