Technicians should verify fitting sizes and mounting footprints

Common Questions Is this TXV compatible with R22 systems

always check the specific pressure and temperature ratings of your boilers before installation

This part is essential for maintaining the efficiency of 90% AFUE furnaces

Lennox 78H11 Thermostat 321702-401 Technicians should verify fitting sizesAs a seasoned technician, you know that a frozen outdoor coil is a quick way to kill system efficiency and stress the compressor. The Lennox 78H11 is a critical heat pump defrost thermostat (L70 35F) designed specifically to regulate the defrost cycle in Lennox heat pump applications. This OEM Lennox replacement part features a fixed temperature range, initiating the defrost sequence when the liquid line or coil temperature drops to 35F and