By centralizing these HVAC control board connections

The Armstrong Furnace H2TXV03 TXV Valve is a high-precision thermostatic expansion valve designed to regulate refrigerant flow with industrial accuracy

this is a 3-phase HVAC compressor

ensuring that the system restarts without manual intervention once water temperatures return to safe operating levels

Refer to the technical datasheet for specific terminal connections

Trane SWT2074 Limit Switch 320819-301 By centralizing these HVAC controlThe Trane SWT2074 Limit Switch is a critical electromechanical safety control engineered for high precision temperature monitoring in Trane HVAC systems, including furnaces and air handlers. Designed with a bimetallic strip mechanism, this high limit switch is calibrated to trigger at 175F (L175) with a 30F differential, ensuring the system shuts down the gas valve or heating elements if internal temperatures exceed safe operating parameters. This OEM