Description
The Fenwal 35‑655930‑001 Hot Surface Ignition Control Module is a high‑quality OEM replacement part designed to deliver reliable ignition performance in gas‑fired HVAC systems. This 24 VAC hot surface ignition (HSI) control board provides precise ignition sequencing, flame monitoring, and integrated safety diagnostics for furnaces, boilers, water heaters, and other combustion appliances.
Key Features
- OEM‑grade hot surface ignition control module engineered for gas‑fired HVAC equipment.
- 24 VAC operation with accurate ignition sequencing and flame detection.
- 4‑second Trial‑For‑Ignition (TFI) timing for reliable burner starts.
- No pre‑purge or inter‑purge timing for direct control logic.
- Microprocessor‑based control and diagnostics for easier service and troubleshooting.
- Suitable for replacing worn or failed ignition controls in furnaces, boilers, and other gas combustion systems.






