the McDonnell & Miller 312200 is the official updated part number that replaces the discontinued 311100

this safety component monitors the burner vestibule for flame rollout conditions

Synthetic rubber construction offers superior resistance to heat and chemical exposure

the T3-4A minimizes the risk of leaks while providing the technician with ample clearance for tightening flare nuts

this component monitors internal heat levels within the furnace cabinet to protect the heat exchanger from thermal excursions

Heil Quaker ICP 1006298 Tube Sensor the McDonnell & Miller 312200The Heil Quaker ICP 1006298 Tube Sensor is a precision OEM replacement part engineered for critical temperature and pressure monitoring in high efficiency natural gas furnaces. Featuring a 3 16" I. D. silicone tube with a 36 inch lead, this component provides real time diagnostic feedback to the integrated furnace control board. Designed for heavy duty HVACR cycles, the sensor ensures precise flame detection and pressure regulation, preventing short