Lennox 78H11 Thermostat Refrigerant A flashing green LED typically

A flashing green LED typically indicates a problem external to the module

and general service applications where corrosion resistance and ease of forming are critical

For reliable HVAC valve repair

prioritizing setpoint adjustment visibility through its dual windows

Installation is streamlined via 8-inch electrical leads and a manual operation lever for system testing and emergency bypass

Lennox 78H11 Thermostat Refrigerant A flashing green LED typicallyAs 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