Nordyne 151886R Restrictor Orifice

When you are troubleshooting a furnace that is running hot or experiencing frequent limit switch trips, the Nordyne 151886R Restrictor Orifice is a critical component to inspect. Designed specifically for inducer assembly airflow regulation, this genuine OEM Nordyne part maintains the precise static pressure required for optimal combustion. As a 1.50-inch restrictor orifice, it manages the exhaust velocity to ensure the heat exchanger transfers energy efficiently without overheating the internal housing.

For veteran contractors, the Nordyne 151886R is a go-to replacement when nuisance pressure switch tripping occurs in short vent systems, typically those with a total equivalent vent length under 10 feet. This plated steel inducer orifice provides superior corrosion resistance against flue gas condensates, preventing the common pitting that leads to restricted airflow. Its exact 0.165-inch thickness and 2.5-inch outside diameter ensure a snap-fit into the inducer outlet, restoring the factory-spec combustion efficiency of the heating system without the need for field modifications.

• Precision-engineered 1.50" inducer restrictor prevents overheating and nuisance limit trips.
• Genuine OEM Nordyne 151886R ensures perfect fitment and system reliability.
• Corrosion-resistant steel construction stands up to high-temperature HVAC exhaust environments.
• Directly replaces legacy part number 151886 for streamlined inventory and service calls.
• Optimizes airflow velocity in short-vent gas furnace applications.

When should the Nordyne 151886R be replaced?
Replace this orifice if you notice physical warping, excessive scaling from condensation, or if the furnace is frequently locking out due to high-limit temperature spikes caused by improper exhaust flow.

Is this orifice compatible with all inducer motors?
This part is specifically engineered for select Nordyne, Intertherm, and Miller gas-fired heaters. Always verify the 1.50-inch center hole diameter matches your furnaceÆs requirements before installation.

Does this part fix pressure switch errors?
Yes, if the error is caused by incorrect venting backpressure, installing the correct restrictor orifice can stabilize the pressure switch signal and resolve intermittent ignition failures.

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.