Lochinvar & A.O. Smith 100166222 Pressure Switch Els PW 17895 also known as the A4F-D

also known as the A4F-D filter drier cartridge

Seamless Integration: Factory-terminated harness with the correct Molex plug prevents high-resistance connections often found in universal kits

this blade mounts securely to the motor shaft

5" Natural Gas

Lochinvar & A.O. Smith 100166222 Pressure Switch Els PW 17895 also known as the A4F-DThe Lochinvar & A. O. Smith 100166222 Pressure Switch is a critical safety component engineered for precise induced draft monitoring in high efficiency commercial boilers and water heaters. As a veteran grade HVAC pressure switch, this part ensures the combustion fan or inducer motor is moving sufficient air to safely vent flue gases before the ignition sequence begins. Built to handle the rigorous demands of hydronic heating systems, it features a