As a direct Carrier replacement air sensor

this assembly is the designated replacement for several older part numbers including 20460603 and 20517902

ensuring reliable combustion cycles and system protection

this variable speed blower motor utilizes an electronically commutated design to maintain consistent torque and CFM even as external static pressure fluctuates

The physical interface includes a 1-3/4" Rotolock suction port with a 7/8" ODF sweat sleeve and a 1-1/4" Rotolock discharge port with a 3/4" ODF sleeve

Patterson-Kelley 26-4000-0128 Ignitor 326058-755 As a direct Carrier replacementThe Patterson Kelley 26 4000 0128 Ignitor is a critical high precision component engineered specifically for commercial boiler ignition systems. Designed for use across the Patterson Kelley Mach and P K Compact series, this direct spark ignitor ensures consistent electrode gapping and reliable arc generation in high demand hydronic applications. Veterans in the field recognize this assembly for its robust ceramic insulation and high temperature alloy