Nordyne 1046638S Ignitor 321894-708 Johnson Controls T-4003-201 Submaster High

Johnson Controls T-4003-201 Submaster High Volume Output Thermostat

22 compliant for professional installations

Durable Brass Construction: Engineered to resist corrosion and handle the rigorous pressure demands of R-22

featuring high-grade elastomers and precision-machined seat components that prevent regulator creep

Nordyne 1046638S Ignitor 321894-708 Johnson Controls T-4003-201 Submaster HighRestore consistent combustion cycles with the Nordyne 1046638S Ignitor, a professional grade silicon nitride replacement engineered for high demand heating applications. This 120V hot surface igniter is the direct OEM successor for discontinued part numbers 1017743S, 904839, and 921074, ensuring seamless integration into Nordyne, Intertherm, and Miller furnace assemblies. Built with superior thermal shock resistance, the silicon nitride element