Lochinvar & A.O. Smith 100110729 Prover Switch 320788-704 you may need to run

you may need to run an additional wire to the ground within the burner housing

This assembly is factory-calibrated to a 1

It also serves as the official replacement for superseded parts

which is critical for safety in stalled-motor scenarios common in damper control

providing the durability required for high-cycle environments

Lochinvar & A.O. Smith 100110729 Prover Switch 320788-704 you may need to runThe 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