The 350 degree F manual reset limit triggers when flames "roll out" toward the burner front rather than being drawn through the heat exchanger

technicians should verify if an EPDM "Hi-Temp" variant like the GB-D is more appropriate for the specific thermal load of the system

This automatic reset limit switch serves as the primary failsafe

Mechanical L8148 models utilize a capillary tube and bulb or a different resistance profile

the internal silicone diaphragm is designed to withstand air or combustion byproducts that do not degrade silicone materials

Carrier 123324-005 Prefilter Els PW 17895 The 350 degree F manualThe Carrier 123324 005 Prefilter is a critical first stage filtration component designed for specific Carrier air handling units and commercial HVAC systems. Measuring exactly 16x12 inches, this washable aluminum mesh filter is engineered to capture large airborne particulates and debris before they reach higher efficiency secondary filters or sensitive internal coils. By maintaining low static pressure and high airflow velocity, this 16x12 prefilter