The proportional circuitry is designed for stability

Common Questions: Is the 0270F05404 required for all furnace types

Stable resistance output minimizes signal interference in complex building automation systems

These are identical parts

but it should be installed in the liquid line for optimal moisture scavenging

Lennox 81G65 Relay 322055-301 The proportional circuitry is designedThe Lennox 81G65 Latching Relay is a specialized DPDT (Double Pole Double Throw) control component engineered for precise electrical switching in commercial and residential HVAC systems. Operating on a 24VAC 50 60Hz coil, this relay utilizes a magnetic latching mechanism that maintains its contact state without requiring a continuous power signal. This design is essential for HVAC lockout circuits and energy saving control logic where maintaining