Lochinvar & A.O. Smith 100110729 Prover Switch 318518-761 using this OEM crankcase heater

using this OEM crankcase heater ensures the electrical specifications and thermal output perfectly match the factory requirements of the condensing unit

If the system is failing to sense flame after ignition

Integrated LP Conversion: Comes standard with a liquid propane kit to simplify job site transitions from NG to LP

ensure you have the appropriate pin and cage gaskets on hand

This board features a universal footprint and standard multi-pin plug-in headers for streamlined field installation with minimal wiring modifications

Lochinvar & A.O. Smith 100110729 Prover Switch 318518-761 using this OEM crankcase heaterThe Lochinvar & A. O. Smith 100110729 Prover Switch is a critical safety component designed for high efficiency condensing boilers and commercial water heaters. This OEM pressure switch serves as a blower prover, ensuring the combustion air blower is generating sufficient static pressure to safely vent flue gases before the ignition sequence begins. As the direct updated version for FS6679 1338, this part features a normally open contact configuration