Proof of Fire (POF) Switches – 2 Pack for Comfortbilt HP21, HP22, HP22i, HP22N, HP50S, HP61 & Alpine HP40

This is a replacement Proof of Fire (POF) switch set designed for select Comfortbilt and Alpine pellet stove models. The POF switch monitors stove temperature to confirm ignition and sustained combustion, signaling the control board to continue operation once a proper fire is established. This listing includes a pair of POF switches, making it suitable for full replacement where two switches are required. Key Details Fits Models: HP21, HP22, HP22i, HP22N, HP50S, HP61, Alpine HP40 Type: Proof of Fire (temperature) switch Function: Detects ignition / confirms active combustion Location: Mounted to exhaust or heat exchange pathway (varies by model) Condition: New replacement parts What’s Included (2) Proof of Fire (POF) Switches Compatibility Notes Compatible only with listed Comfortbilt and Alpine models Not guaranteed to fit other models Verify switch configuration and wiring with your stove before ordering