Reznor 177398 Gas Valve

The Reznor 177398 Gas Valve is a critical OEM replacement part designed for high-performance combustion control in unit heaters and industrial HVAC applications. This 2-stage LP gas valve features a 1/2" NPT inlet and a 3/4" NPT outlet, specifically engineered to manage liquid propane flow with precision. Built for 24V control systems, it facilitates seamless transitions between low-fire and high-fire stages, optimizing fuel efficiency and maintaining consistent manifold pressure. The rugged, corrosion-resistant body ensures long-term reliability in demanding commercial environments, while the compact design allows for straightforward integration into tight cabinet clearances.

As a genuine Reznor part, the 177398 eliminates compatibility issues common with universal aftermarket valves. It is frequently utilized in Reznor CAUA series models, providing the specific pressure regulation required for safe and effective ignition sequences. For technicians performing HVAC troubleshooting, this valve is the primary solution for resolving "clicking" solenoid issues or inconsistent flame patterns in 2-stage propane systems. Using this factory-approved 24V gas valve ensures the equipment maintains its original safety ratings and operational specifications.

• Dual-Stage Control: Precisely manages gas flow for improved combustion efficiency and smoother ignition cycles.
• Direct OEM Fit: Designed to exact Reznor specifications, ensuring perfect alignment with existing 1/2" x 3/4" piping.
• Propane Optimized: Factory-calibrated for LP gas applications, reducing the need for field conversion kits.
• Heavy-Duty Construction: Industrial-grade materials resist vibration and thermal stress in high-cycle heating environments.
• Voltage Compatibility: Operates on standard 24VAC, making it compatible with most commercial HVAC control boards.

What equipment is compatible with the Reznor 177398?
This valve is commonly used in Reznor CAUA 150, 200, and 250 unit heaters. Always verify the model and serial number of your equipment to ensure a direct match before installation.

Can this LP valve be converted for natural gas use?
The 177398 is specifically configured for liquid propane (LP). While some valves support conversion, it is strongly recommended to use a dedicated natural gas valve to maintain factory performance standards.

What are the symptoms of a failing gas valve?
Technicians typically look for intermittent ignition, the sound of the solenoid "clicking" without gas release, or an inability to sustain the second heating stage.

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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.