Lennox 45H03 Relay 320819-301 Robust Construction: Designed for high-cycle

Robust Construction: Designed for high-cycle commercial environments requiring 24VAC control circuits

or the water heater failing to exit the pre-purge cycle due to insufficient pressure switch closure

2 bar) and a broad medium temperature range from -40°F to 221°F

Look for a "hunting" or kicking sound during startup

Lennox 45H03 Relay 320819-301 Robust Construction: Designed for high-cycleThe Lennox 45H03 is a heavy duty DPDT (Double Pole Double Throw) relay manufactured by Deltrol Controls, specifically designed for high amperage HVACR switching applications. This 275TM series relay operates on a 24VAC coil and is engineered to manage inductive loads in commercial air handlers, condensers, and refrigeration systems. Its robust contact design ensures reliable circuit isolation and motor starting capabilities, making it a direct OEM