Bard HVAC 5651-142BX Valve

The Bard HVAC 5651-142BX is a precision-engineered SmartValve gas control system designed for high-efficiency natural gas applications. This unit serves as the direct replacement for 5651-142, featuring a 1/2" x 1/2" NPT configuration that ensures seamless integration into existing Bard wall-mount units and furnaces. Operating on a 24VAC control circuit, this valve combines gas flow regulation with integrated electronic ignition sequencing. Its intermittent pilot ignition design improves system reliability by eliminating the need for a standing pilot. The 5651-142BX is critical for maintaining consistent manifold pressure and secondary heat exchanger performance in sensitive HVACR environments. Technicians should verify voltage and amperage draws during installation to ensure the Honeywell SmartValve technology communicates correctly with the master control board for safe, automated combustion cycles.

• Direct OEM Replacement: Replaces legacy 5651-142 models without the need for additional piping modifications.
• Integrated Ignition Control: Consolidates gas regulation and spark-to-pilot functions into a single Honeywell SmartValve footprint.
• Precise Gas Regulation: Maintains stable natural gas flow to prevent burner cycling and flame rollout.
• High-Efficiency Compatibility: Optimized for modern Bard HVAC systems requiring 1/2-inch NPT inlet and outlet ports.

Is the Bard 5651-142BX compatible with LP conversions?
This specific model is calibrated for natural gas (NAT). An OEM-certified conversion kit must be used if field-adjusting for liquid propane applications.

Does this valve replace the older 5651-142 version?
Yes, the 5651-142BX is the manufacturer-specified direct replacement, engineered to match the electrical and mechanical specifications of the previous 5651-142 valve.

How do I troubleshoot ignition failure with this SmartValve?
Check for 24V power at the valve and ensure the pilot tube and ignitor-sensor assembly are free of carbon buildup and properly grounded.

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.