Auburn E5-1420-24 Electrode Probe 321042-401 but it is typically recommended

but it is typically recommended every 6 to 12 months for optimal performance

It is highly recommended to stay with the 210Op 180Cl rating specified for your specific York model

and Payne condensing furnaces

you maintain the internal aerodynamics required for optimal heat exchange and cooling cycle efficiency

Ensure the drain plugs are removed at the lowest point of the motor to prevent condensation buildup

Auburn E5-1420-24 Electrode Probe 321042-401 but it is typically recommendedThe Auburn E5 1420 24 Electrode Probe is a precision engineered solid stainless steel liquid level electrode designed for demanding industrial fluid management systems. As a critical component for liquid level sensing solutions, this 24 inch probe offers exceptional durability and resistance to oxidation. Featuring a 1 4" diameter and a standard 1 4 20 threaded connection, it ensures a secure, leak proof integration into various tank configurations.