Lennox 13H78 Relay 322838-754 or a blower that fails

or a blower that fails to engage despite receiving a 24V signal at the 'G' terminal

Built for the rigors of mechanical rooms and warehouses

Efficient Flow: A 4

Can this board be used in two-stage furnace applications

Built with a heavy-duty extruded aluminum frame and blades

Lennox 13H78 Relay 322838-754 or a blower that failsThe Lennox 13H78 Relay is a heavy duty 24V DPDT relay engineered for precise switching control within Lennox heating and cooling systems. Built to handle dual circuit switching, this double pole double throw relay manages various voltage pathways simultaneously, ensuring consistent communication between the thermostat and high voltage components like blower motors or compressors. Operating at a standard 50 60 Hz frequency, the 13H78 is a critical HVAC