Velocity Boiler Works (Crown) 3505065 Control Board

The Velocity Boiler Works (Crown) 3505065 Ignition Control Board is a critical OEM component designed to manage the full ignition sequence for gas-fired hydronic systems. This high-reliability ignition control module operates on a 24 VAC power supply and features a broad operating temperature range of -40°F to 175°F, ensuring stable performance in demanding mechanical room environments. Built with integrated safety mechanisms, the 3505065 control board continuously monitors flame presence and system safety limits, executing a hard lockout if an abnormal condition is detected to protect the Crown boiler heat exchanger and burner assembly.

For field technicians, this direct spark ignition board provides simplified troubleshooting through an onboard diagnostic LED that communicates specific fault codes. Its surface-mount design allows for rapid replacement in Crown residential boilers, effectively restoring communication between the 120V line supply and the 24V gas valve circuit. When replacing an existing 3505065 furnace control, always verify 50/60 Hz frequency compatibility and check for consistent voltage across the transformer secondary to avoid premature component failure during high-demand cycles.

Key Benefits

• Precision Control: Manages the firing cycle and flame rectification for consistent ignition and system efficiency.
• Field Diagnostics: Features an integrated LED indicator to assist technicians in identifying flame failures or sensor malfunctions.
• Industrial Durability: Engineered with high-grade circuitry to withstand thermal cycling and vibration.
• Seamless Integration: Direct OEM replacement for Velocity Boiler Works 3505065, ensuring pin-for-pin compatibility in supported models.

Common Questions

How do I reset the 3505065 control board after a hard lockout?
Once the underlying fault (such as a flame failure or open limit switch) is corrected, the board can typically be reset manually using the designated button on the display or by power-cycling the 120VAC line voltage.

What does a rapidly flashing LED mean on this ignition board?
A rapid flash usually indicates a lockout condition. Technicians should consult the specific diagnostic chart for the boiler model to determine if the issue relates to the flame sensor, gas valve, or a rollout switch activation.

Will this board work in both 50Hz and 60Hz power environments?
Yes, the 3505065 ignition control is rated for 50/60 Hz frequency, making it suitable for a wide range of regional power applications.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.