Lochinvar & A.O. Smith 100110013 Pressure Switch 321894-708 20-amp enclosed power relay designed

20-amp enclosed power relay designed specifically for the rigorous demands of HVAC control systems and industrial automation

provided the correct burner orifices and manifold pressures are verified during the gas furnace repair

and circuit boards without the risk of over-saturation

if you have a D-3153-1 through D-3153-18

Lochinvar & A.O. Smith 100110013 Pressure Switch 321894-708 20-amp enclosed power relay designedThe Lochinvar and A. O. Smith 100110013 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high efficiency water heaters and boilers. This differential air pressure switch is calibrated to detect proper draft conditions, ensuring the blower motor is moving sufficient air before allowing the ignition sequence to proceed. Engineered as a direct OEM replacement part, the 100110013 replaces legacy part numbers