Nordyne 155316R Inducer Orifice

The Nordyne 155316R Inducer Orifice is a critical engineering component designed for high-efficiency fuel combustion in gas-fired heating systems. As a veteran-grade furnace draft inducer part, this orifice is precision-machined to regulate vent airflow, ensuring the static pressure is correctly maintained for the pressure switch to close during the pre-purge cycle. Utilizing a genuine Nordyne replacement orifice restores the system's ability to pull an accurate vacuum, preventing intermittent ignition failures or pressure switch trip codes that often plague older Nortek furnace parts.

This 1.438-inch OEM HVAC inducer orifice is built from heat-resistant composites to withstand the corrosive environment of flue gases. It acts as a restrictor to optimize the burner-to-vent transition, forcing the draft inducer motor to work within its intended performance curve. For contractors servicing Intertherm, Miller, or Nordyne units, replacing a cracked or missing orifice with the 155316R is non-negotiable for achieving the factory-specified air-to-fuel ratio and maintaining safe carbon monoxide levels during the combustion process.

• Ensures accurate static pressure for consistent pressure switch activation.
• Optimizes combustion efficiency by restricting airflow to precise factory tolerances.
• Genuine OEM Nordyne part guarantees drop-in compatibility and reduces installation time.
• Constructed from high-grade durable materials to survive high-temperature flue environments.
• Helps resolve furnace cycling issues caused by improper draft induction.

How do I know if I need to replace the inducer orifice?
If you are seeing a pressure switch stuck open code but the motor is running, inspect the orifice for cracks, obstructions, or heat-induced warping that may be preventing the correct vacuum levels.

Is the 155316R compatible with all Nordyne furnaces?
No, inducer orifices are sized specifically to the BTU rating and blower capacity of the furnace. Always cross-reference the 155316R against your specific model number to ensure the vent restriction is correct for that heat exchanger.

What happens if I run the furnace without the inducer orifice?
Operating without the orifice will cause excessive airflow through the burners, leading to poor flame characteristics, potential safety shut-offs, and increased wear on the heat exchanger. This part is essential for safe operation.

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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.