A combustion analysis showing elevated CO levels is a definitive indicator that the integrity of the heat exchanger has been breached

the "/U" suffix simply denotes a "Universal" packaging designation used by the manufacturer

ensuring the unit moves the correct CFM without overloading the 3/8 inch bore motor shaft

High static pressure due to dirty filters or undersized ductwork often stresses the ECM module

humming motors

York S1-328-16423-000 Kit 322056-301 A combustion analysis showing elevatedThe York S1 328 16423 000 Condensate Pan Kit 130M is a critical OEM replacement part engineered specifically for high efficiency 95+ AFUE 33 inch gas furnaces. Designed for 130,000 BTU systems, this secondary heat exchanger drain pan features a precise 1. 13 inch restrictor hole size to maintain correct pressure differentials and drainage flow. In the field, technicians often encounter cracked or warped pans that lead to secondary heat exchanger