Lennox 14T66 Pressure Switch 326058-758 ensuring correct voltage signal processing

ensuring correct voltage signal processing and terminal matching

preventing vapor from reaching the TXV during low-load cycles

always ensure the diaphragm is oriented according to the manufacturer’s installation instructions to prevent moisture accumulation in the sampling tubes

verifying compatibility with specific 50-series model numbers is required to ensure seamless integration with existing piping and control logic

Lennox 14T66 Pressure Switch 326058-758 ensuring correct voltage signal processingThe Lennox 14T66 Pressure Switch is a critical dual stage safety component engineered for 90% efficiency modulating gas furnaces. As a veteran technician knows, maintaining the correct pressure differential is non negotiable for safe combustion. This OEM Lennox replacement part is factory calibrated to operate within a specific water column range of 1. 00" to 0. 25" WC, ensuring the inducer motor pulls the required vacuum before the ignition sequence