624775 Nordyne Gas Valve – 24 VAC, 3.5″ WC, Natural Gas, ½″ NPT

This OEM gas valve provides reliable first-stage control for Nordyne and private-label furnaces. It operates on 24 VAC, delivers 3.5″ water column manifold pressure, and features a ½″ NPT inlet/outlet. Its robust diaphragm and solenoid coil ensure consistent ignition sequencing in M-series and G-series units.

Cross-Reference Part Numbers

Compatibility

• Nordyne furnace models: M2, M3, G3, G4, G5, G6, UTEC series

• Private-label units by Maytag, Miller, Broan, Frigidaire, Gibson, Intertherm, Partners Choice

• Suits natural-gas applications requiring 3.5″ WC manifold pressure and ½″ NPT connections

Technician Notes

• Always shut off gas supply and relieve line pressure before service.

• Verify incoming gas pressure meets manufacturer’s spec (typically 5–7″ WC).

• Check coil resistance at 24 VAC; expect approximately 15 Ω.

• Use a leak-detection solution on all fittings and joints after installation.

• Photograph or diagram existing wiring before disconnecting valve leads.

• Confirm proper orientation: inlet port taps the supply line, outlet port feeds manifold.

• Torque ½″ NPT fittings to 10–15 ft-lb; avoid over-tightening the valve body.

• Apply 24 VAC to the coil and listen for a crisp “click” indicating valve seating.

• Monitor manifold pressure at valve outlet under load—aim for steady 3.5″ WC during burner operation.

• Run multiple ignition cycles to ensure diaphragm integrity and no sticking.

Additional Resources

• Download the OEM gas valve technical datasheet (PDF)

• Access a printable cross-reference sheet covering Nordyne and private-label gas valves

• Watch our step-by-step video guide on first-stage gas valve replacement

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