Description
The Fenwal 35‑655800‑003 is a 24 VAC hot surface ignition (HSI) control module designed for gas‑fired heating systems including furnaces, boilers, water heaters, and other HVAC combustion appliances. This microprocessor‑based control board manages ignition sequencing, flame sensing, and safety monitoring to help ensure reliable burner start‑ups and efficient, safe operation.
Key Features
- OEM 24 VAC hot surface ignition control module engineered for gas‑fired heating systems.
- 7‑second trial‑for‑ignition (TFI) cycle with single ignition attempt for reliable starts.
- No pre‑purge and no inter‑purge timing, ideal for direct ignition control strategies.
- Microprocessor‑based control logic with on‑board diagnostic LEDs to simplify service and troubleshooting.
- Edge connector type for easy installation and replacement.
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