As a critical McQuay replacement part

If the furnace is not staying lit or you observe sporadic ignition

the valve remains shut when de-energized and opens only when the 120V solenoid coil receives power

the Lennox 30W33 Ignition Module Kit serves as the direct OEM replacement for aging Honeywell S8670K3000 units

check for continuity across the terminals while the reset button is depressed

Watts 0153614 Valve 323269-701 As a critical McQuay replacementThe Watts 0153614 (Series 40L 3 150) is a heavy duty 3 4 inch T&P relief valve engineered for critical temperature and pressure protection in commercial water heating systems. Designed for direct installation into tank tappings, this ASME rated relief valve features a 3 inch thermostat probe with a specialized thermo bonded coating to resist mineral accumulation and ensure accurate thermal response. With a high capacity steam discharge rating of