Nordyne 1017743S 120V Ignitor Free Shipping

Nordyne / Miller / Intertherm 1046638S Nitride Ignitor | 120V OEM

The Nordyne 1046638S is a genuine factory-authorized 120V Nitride Hot Surface Ignitor (HSI). As an Original Equipment Manufacturer (OEM) component, it is the primary ignition source for gas-fired furnaces, engineered to reach temperatures high enough to ignite the burner assembly quickly and reliably.

This specific nitride ignitor is more durable than older silicon carbide versions, offering a longer service life and better resistance to physical shock and vibration.

Compatibility & Cross-Reference

The 1046638S is the current technical standard for several legacy and manufacturer-specific part numbers:

Directly Replaces Old Part Numbers: 1017743S, 632504, 921074, 1046638S, and 9046638S.
Manufacturer Model: 789A-914A1 and Coorstock model 951.
Equipment Fitment: Specifically designed for G7S, MGC, and GUH series furnaces used in residential and manufactured housing.

Why Choose a Genuine Nordyne Nitride Ignitor?

Nitride Durability: Unlike fragile silicon carbide ignitors, nitride material is more robust and less prone to cracking from handling or moisture.
Direct Fitment: Includes the factory-correct Molex connector, ensuring a secure electrical connection without the need for wire cutting or splicing.
Precise Heat Curve: Calibrated to reach the exact ignition temperature required by the furnace control board, preventing "delayed ignition" or "no-start" safety lockouts.
OEM Safety: Using a genuine part maintains the integrity of the furnace’s safety listing and ensures compatibility with the flame rectification circuit.

Troubleshooting & Installation

Visual Check: If the ignitor does not glow during the startup sequence, check for a visible crack or a dark "burn spot" on the element.
Continuity Test: Using a multimeter, a functional ignitor should show a resistance reading. An "Open" or "OL" reading indicates the element is broken.
Handling Note: While nitride is more durable than carbide, avoid touching the element with bare hands, as skin oils can create hotspots and shorten its lifespan.