The Lennox 36A77 Relay is a mission-critical 24V 3PDT relay engineered for precise electrical switching in commercial and residential HVAC systems

26 WC pressure switch acts as a primary safety limit

As a veteran-grade HVAC replacement board

The Carrier HD52AR237 is typically configured for a specific rotation (CW or CCW) as an OEM part

it ensures stable reactive power across various system configurations

Lochinvar & A.O. Smith 100166325 Pump 319852-301 The Lennox 36A77 Relay isThe Lochinvar & A. O. Smith 100166325 Pump Less Volute is a heavy duty centrifugal circulator pump component engineered for high efficiency commercial water heating systems. This replacement pump motor and impeller assembly is designed for rapid integration into existing volutes, minimizing downtime during critical hydronic repairs. Built with a high torque motor and precision balanced impeller, it maintains optimal flow rates in Lochinvar Knight and