Description
The A.O. Smith 9005256015 Hot Surface Ignitor is an ignition component applied in gas-fired heating equipment to ignite the burner during startup operation. It generates the heat required to light the gas supply within FPSH-40/50 and FPST-50 units, supporting controlled ignition during heating cycles. This ignitor is commonly positioned near the burner assembly where consistent spark-free ignition is necessary for proper furnace or water heating operation. Integrated into HVAC systems and gas heating equipment, it contributes to stable burner activation and supports temperature generation during repeated operating cycles.









