The 660303R Nordyne Pilot Orifice is a genuine OEM liquid propane (LP) gas pilot orifice designed to provide accurate pilot gas flow for reliable ignition and stable pilot flame performance. Featuring a precision 0.010-inch orifice opening, this component helps ensure proper thermocouple heating, dependable burner ignition, and efficient operation of LP-fired heating equipment. The 660303R is commonly used in Nordyne-manufactured furnaces and related heating systems where proper pilot flame regulation is critical for safe operation.

Cross-Reference

• 660303R
• Nordyne 660303R
• Nortek 660303R
• LP Pilot Orifice .010
• #10 Pilot Orifice

Direct OEM

Yes

Genuine Nordyne OEM replacement part.

Compatible Brands

• Nordyne
• Intertherm
• Miller
• Frigidaire
• Maytag
• Gibson
• Tappan
• Broan
• NuTone
• Philco

Application

Designed for LP (Liquid Propane) gas pilot burner applications requiring a 0.010-inch pilot orifice.

Commonly used in:

• Mobile Home Furnaces
• Manufactured Housing Furnaces
• Residential Gas Furnaces
• Standing Pilot Systems
• LP Gas Heating Equipment
• Replacement Pilot Burner Assemblies

Always verify compatibility using the equipment model number and parts breakdown.

Related Components

• Pilot Burner Assemblies
• Thermocouples
• Gas Valves
• Pilot Tubing
• Flame Sensors
• Ignition Components
• LP Conversion Components
• Main Burners

Technician Notes

• Designed specifically for LP (propane) gas applications.
• Precision-drilled .010" orifice for accurate pilot gas delivery.
• A partially restricted orifice can cause weak pilot flame conditions.
• Inspect pilot tubing and burner assemblies for contamination during replacement.
• Verify pilot flame impingement on the thermocouple after installation.
• Confirm proper LP supply pressure when troubleshooting ignition issues.

Common Symptoms of Failure

• Pilot will not light
• Weak pilot flame
• Pilot will not stay lit
• Delayed burner ignition
• Intermittent heating operation
• Poor thermocouple heating
• Restricted pilot gas flow
• Nuisance lockouts

Installation Tips

1. Turn off electrical power and shut off the gas supply.
2. Confirm the appliance is configured for LP gas.
3. Carefully remove the old pilot orifice.
4. Inspect pilot tubing and burner ports for debris.
5. Install the new 660303R orifice securely.
6. Leak-test all gas connections.
7. Verify proper pilot flame size and stability.
8. Follow OEM service procedures and local codes.

Recommended Inspection Items

• Thermocouple condition
• Pilot flame quality
• Pilot tubing condition
• Gas valve operation
• LP supply pressure
• Burner ignition sequence
• Heat exchanger condition
• Venting system
• Burner cleanliness