Reznor 40965 Orifice

The Reznor 40965 LP Pilot Orifice is a precision-machined propane gas component engineered for reliable ignition in light-commercial and industrial unit heaters. Designed for liquid propane (LP) pilot burner assemblies, this #4207 sized orifice ensures the exact gas-to-air mixture required to maintain a stable pilot flame, preventing common nuisance drop-outs caused by improper millivolt signals to the thermocouple. As an authentic replacement Reznor gas orifice, it is optimized for high-performance combustion in Reznor UA, XL, XLB, CXL, and CXLB series unit heaters ranging from 30 to 105 MBH capacities. Integrating this OEM Reznor 40965 component into your heating system maintenance routine ensures compatibility with Nortek Global HVAC standards, maintaining the integrity of the fuel delivery system without the risks associated with non-genuine fittings. This propane pilot orifice is essential for technicians performing gas conversions or repairing unit heaters where the original orifice has become fouled or damaged by debris.

• Precision Metering: Specifically calibrated as a #4207 orifice to provide the exact flow rate required for liquid propane systems.
• System Compatibility: Fully compatible with Reznor unit heaters in the UA, XL, and CXLB series, ensuring seamless fitment within the pilot burner assembly.
• Enhanced Flame Stability: Engineered to produce a robust, consistent pilot flame that maintains proper thermocouple heat saturation for reliable gas valve operation.
• Industrial Build Quality: Constructed from high-grade materials to withstand the thermal stress and high-duty cycles of commercial heating environments.

Is the Reznor 40965 compatible with natural gas systems?
No, this specific part is a liquid propane (LP) orifice. Installing this in a natural gas system will result in improper combustion and potential safety hazards; always verify your fuel type and orifice size before installation.

What unit heater models utilize this pilot orifice?
This component is frequently used in Reznor models UA, XL, XLB, CXL, and CXLB with sizes ranging from 30 to 105. Cross-reference your heater’s model and serial number with the technical manual to confirm the required orifice part number.

Why is my pilot flame weak or hitting the thermocouple incorrectly?
A weak or split pilot flame is often a symptom of a clogged or damaged pilot orifice. Replacing the old orifice with a new Reznor 40965 can restore the correct flame pattern and ensure the gas valve receives the necessary millivolt signal to stay open.

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.