As a direct 100208551 replacement part

this SF series unit features a 48 cubic inch filtration area

Its robust brass body and copper extensions support a wide range of refrigerants

45" WC SPST switch

this specific part is a natural gas pilot orifice

Carrier HH680405 Limit Switch Refrigerant As a direct 100208551 replacementThe Carrier HH680405 Limit Switch is a critical safety component designed for precise thermal regulation within high performance HVAC systems. Engineered as an Auto Limit Switch, this part features a broad operating range of 30 250F, making it a versatile OEM replacement part for Carrier, Bryant, and Payne furnaces. As an HVAC high limit switch, it monitors discharge air temperatures to prevent heat exchanger damage or hazardous operation. Its