Resideo 272804A Assembly the sensor is likely the

the sensor is likely the culprit

Its compact form factor allows for seamless integration into standard York control panels

or catalytic heater

Do I need thread sealant for the flare connections

N-Style Mounting: Standardized mounting configuration simplifies installation in tight burner compartments

Resideo 272804A Assembly the sensor is likely theThe Resideo 272804A is a critical field service accessory designed for precise temperature regulation and physical security of electric heating systems. This range stop and locking screws assembly allows technicians to set definitive minimum and maximum setpoint limits, preventing end user over adjustment that leads to energy waste or equipment strain. Engineered for Honeywell Home thermostats, including the T410, T498, T4398, and T4098 series, this