Armstrong Furnace R38999D018 Heat Exchanger 30067439-890 while the 18" wire leads

while the 18" wire leads offer ample length for clean terminal connections

Can I replace just the auxiliary end switch

For applications requiring time preservation during outages

ensuring operator intervention

Reliable Switching: Heavy-duty internal contacts ensure consistent electrical signaling to the control board

Armstrong Furnace R38999D018 Heat Exchanger 30067439-890 while the 18" wire leadsThe Armstrong Furnace R38999D018 Heat Exchanger is a critical OEM replacement part designed to restore the efficiency and safety of your HVAC system. Engineered from high grade stainless steel, this primary heat exchanger assembly is built to withstand extreme thermal cycling while preventing hazardous combustion gas leaks. As a genuine Armstrong Air component, the R38999D018 ensures a precise fit and seamless integration with compatible furnace