audible humming from the coil without gas flow

and steel guard rods for immediate field installation

By replacing a failing blower motor with the Reznor 201761 1/3 HP motor

technicians should verify the condition of the existing strainer or replace it to protect the new orifice from contaminants

Lochinvar & A.O. Smith 100208392 Switch 320819-301 audible humming from the coilAs an HVAC technician, you know that precise pressure monitoring is non negotiable for high efficiency combustion. The Lochinvar & A. O. Smith 100208392 Switch is a critical safety component designed to verify proper drafting and inducer performance. This OEM pressure switch features a highly sensitive 1 20" wc (0. 05 inches water column) set point, making it essential for detecting even minor pressure fluctuations that could lead to incomplete