Lennox 86P21 SPDT Fan Relay 24V 18AMP

The Lennox 86P21 is a Single-Pole, Double-Throw (SPDT) fan relay, a key component in Lennox and compatible HVAC systems. It acts as an electronic switch that controls the operation of the system's fan. The SPDT design allows the relay to switch between two circuits, turning the fan on or off based on signals received from the thermostat or other control boards. This relay operates on a standard 60Hz frequency and can handle up to 18 amps of current, making it suitable for most residential HVAC fan motors. Despite its functionality, the Lennox 86P21 is compact and lightweight, weighing only 0.16 pounds. By regulating fan operation, the 86P21 relay ensures efficient airflow throughout the HVAC system. This translates to proper temperature distribution within your living space and contributes to overall system health by preventing overheating of components.