This unit functions as a technical upgrade for several legacy series with similar pre-purge and trial-for-ignition timings

Always verify the voltage at the 5-pin power connector before installation to prevent module failure

The Trane SUP1699 Motor Support is a critical structural component engineered for heavy-duty HVAC motor mounting applications

providing comprehensive manifold control

look at the discharge side (the side air is moving toward) to ensure the rotation matches your motor's lead orientation

Lochinvar & A.O. Smith 100173314 Harness 318423-701 This unit functions as aThe Lochinvar & A. O. Smith 100173314 Gas Valve Harness is a critical electrical interface designed for high efficiency boiler and water heater systems. This genuine OEM wiring harness serves as the primary signal path between the integrated control board and the gas valve, ensuring precise modulation and safety during the ignition cycle. As a veteran technician, you know that intermittent firing issues or "no flame" codes often trace back to