The two reheat stages are factory-calibrated to actuate sequentially following the fan start

When should this wiring harness be replaced

ensuring exact physical fit and electrical connector alignment

it utilizes a negative biased power element diaphragm to ensure the circuit interrupts power immediately upon reaching the calibrated threshold

The Functional Devices TR50VA004 Transformer is a heavy-duty 50VA power transformer engineered for multi-tap versatility in commercial and industrial HVAC control circuits

Lennox 74W72 Gas Manifold 318423-701 The two reheat stages areThe White Rodgers 50A55 843 is a universal integrated furnace control board designed to streamline service calls by replacing a vast range of silicon carbide ignition modules from White Rodgers and various OEMs like Carrier, Goodman, Lennox, and Trane. This hot surface ignition (HSI) controller utilizes a microprocessor to provide constant monitoring of the gas burner, inducer motor, and fan cycles. It features a replaceable 5 amp automotive style