ensuring the flame signal remains stable and the 100208085 burner assembly operates within manufacturer specifications

and 100146549

it must be replaced to prevent safety hazards

Check the part number stamped on the existing orifice or cross-reference the Reznor replacement parts catalog using your unit’s model and serial number to ensure bore size alignment

Carrier HH18HA493 Limit Switch ensuring the flame signal remainsReplace your faulty safety sensors with the Carrier HH18HA493 Limit Switch, a precise furnace limit control designed for Carrier, Bryant, and Payne residential heating units. This genuine OEM replacement part is a disc style, normally closed (NC) safety device that monitors the heat exchanger and inducer housing temperatures. To prevent heat exchanger cracking or component failure, the switch is calibrated to open the circuit at 200F if overheating