Parker 4108-00 Valve THPU32HP7Y or contamination within the blower

or contamination within the blower housing that introduces abrasive particulates between the shaft and the inner race of the bearing

the switch will open and prevent the unit from heating

the 100165931 prevents unburned gas accumulation and nuisance shutdowns

Common culprits include a restricted flue vent

even if no visible cracks are present

Parker 4108-00 Valve THPU32HP7Y or contamination within the blowerAs an HVACR professional, you know that managing secondary coolants in a high draw commercial setting requires hardware built for precision and durability. The Parker 4108 00 Valve is a normally closed solenoid valve specifically engineered to handle the unique demands of secondary coolant systems, including high volume circulation of propylene glycol, ethylene glycol, and Dynalene. With its 1 3 8" ODF extended copper connections, this valve allows