Lochinvar & A.O. Smith 100165931 Flame Sensor Els PW 17895 10" WC switch is likely

10" WC switch is likely failing to close or detect the vacuum

completing the safety circuit once the inducer fan generates sufficient suction

Maintains mechanical integrity under pressure

a noticeable buzzing sound from the transformer

Lochinvar & A.O. Smith 100165931 Flame Sensor Els PW 17895 10" WC switch is likelyWhen you're dealing with a lockout on a high efficiency condensing unit, the Lochinvar & A. O. Smith 100165931 Flame Sensor is a critical component to inspect. This genuine OEM flame sensor is identical to PLT3023 and comes complete with the necessary gasket to ensure a pressurized seal during installation. Designed specifically for industrial and commercial applications, this HVAC replacement part is the standard for Knight XL (KBN601 801), Armor