This specific model is calibrated for the Fahrenheit scale

Ensure the gasket is seated correctly and tighten until the hex head is flush and snug

Smith 100233594 Burner Gasket is a critical high-temperature seal engineered for high-efficiency condensing boilers and water heaters

and Heil-Quaker parts

Carrier HH19ZA125 Limit Switch 326058-758 This specific model is calibratedThe Carrier HH19ZA125 Limit Switch provides critical thermal monitoring for residential and commercial heating systems. This OEM Carrier replacement part is engineered to open the electrical circuit when the internal temperature reaches 125F, effectively preventing the heat exchanger from exceeding safe operating limits. Classified as an L125 35F limit control, the switch features an automatic reset mechanism that closes the circuit once the system