Armstrong Furnace R38999D020 Heat Exchanger Els PW 17895 Installing a switch with a

Installing a switch with a higher limit can lead to heat exchanger failure or a fire hazard

You must verify the model and serial number of the air handler or furnace to ensure a proper match for physical dimensions and motor mounting

always verify against your specific model number

Using a multimeter set to the μA (microamp) scale

Armstrong Furnace R38999D020 Heat Exchanger Els PW 17895 Installing a switch with aThe Armstrong Furnace R38999D020 Heat Exchanger is a high performance OEM replacement part engineered specifically for technical efficiency and long term reliability in Armstrong, Allied, and Concord heating systems. Constructed from premium grade stainless steel, this S S Heat Exchanger provides exceptional resistance to corrosion and rust, ensuring it can withstand the intense thermal cycles of a high demand furnace. With its 6 burner tube