Key Benefits Precise Thermal Response: Fixed 135°F setpoint ensures the blower activates only when the heat exchanger is sufficiently primed

this Safgard series control provides precise boiler safety monitoring and simplified troubleshooting via an integrated test button

System Diagnostics: LED indicators provide real-time status and assist in rapid troubleshooting of flame signal or hardware faults

the blower relay on the board has likely stayed open or fused shut

the 4350-128 is specifically calibrated for the 150°F to 400°F range typical of griddles

Heil Quaker ICP 1183507 Circuit Board 30067439-890 Key Benefits Precise Thermal Response:As a seasoned technician, you know that the Heil Quaker ICP 1183507 Circuit Board is the critical logic center for high efficiency variable speed furnaces. This OEM furnace control board is a direct replacement designed to manage the precise timing of the inducer motor, blower operation, and hot surface igniter. When you encounter common field issues like erratic blower behavior or a failure to sustain a flame signal, swapping in this genuine ICP