or a pressure switch fault code on the furnace control board

often indicating flame sense failure

the TRR1546 is a drop-in solution that maintains system impedance standards and electrical safety

ensuring a seamless field upgrade without the need for extensive rewiring or bracket modifications

Lochinvar & A.O. Smith 100113146 Blower 328140-751 or a pressure switch faultThe Lochinvar & A. O. Smith 100113146 Vertex 100 Blower is a critical combustion component engineered specifically for high efficiency Vertex GDHE series water heaters, including GDHE 50 and GDHE 75 models. As an OEM replacement for the obsolete 9008863005 blower assembly, this unit is designed to maintain precise air to gas ratios and static pressure, ensuring legal compliance with emission standards and maximizing thermal efficiency in both