Modine 3H0325990001 Pilot Orifice

The Modine 3H0325990001 Pilot Orifice is a critical OEM component designed specifically for liquid propane (LP) gas fired unit heaters. As a direct engineering replacement for the legacy 3H32599-1, this precision-machined orifice ensures the correct gas-to-air mixture for stable pilot flame ignition and consistent thermocouple heating. In the field, technicians often encounter intermittent lockout issues or weak pilot flames caused by carbon buildup or improper sizing; swapping in this genuine Modine replacement part restores the millivolt signal required for the main gas valve to engage securely. This LP pilot orifice is compatible with a wide range of Modine equipment, including PAE100, PAE125, and PAE200 series units. Proper installation is vital for maintaining the secondary air requirements and preventing soot accumulation within the pilot assembly. Utilizing this authentic vented heater component maintains the manufacturer’s specified combustion efficiency and prevents nuisance service calls related to ignition failure in high-demand industrial or commercial heating applications.

• Direct OEM Replacement: Engineering-matched to replace the 3H32599-1 without manifold modifications.
• Precision LP Calibration: Specifically drilled for liquid propane flow rates to ensure a stable, blue pilot flame.
• System Reliability: Minimizes thermocouple dropouts and ignition delays by providing a steady heat source for the flame sensor.
• Broad Compatibility: Standardized fit for Modine gas-fired unit heaters and duct furnaces featuring standing or intermittent pilots.

Can I use this orifice for a Natural Gas to LP conversion?
Yes, this 3H0325990001 orifice is the correct component required when field-converting Modine units to propane gas, ensuring the pilot burner operates at the correct BTU output.

What are the signs that a pilot orifice needs to be replaced?
If you observe a yellow, lazy flame, or if the pilot light frequently goes out despite a functional thermocouple, the orifice may be restricted by debris or enlarged through improper cleaning, requiring a genuine Modine part replacement.

Is this part compatible with spark ignition systems?
This orifice is designed for the pilot burner assembly and functions effectively in both standing pilot and intermittent electronic ignition systems using LP gas.

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.