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The Goodman 20214203 is a genuine OEM condensate drain angle designed for the ACSH961155DXAA 96% AFUE high-efficiency gas furnace. In condensing furnaces, the secondary heat exchanger produces acidic condensate that must be routed safely to the drain trap and away from the heat exchanger and burner assembly. This molded drain angle directs that flow, helping prevent water backup, corrosion, and nuisance pressure-switch lockouts caused by clogged or misrouted drainage.
The OEM 20214203 is dimensionally matched to Goodman's condensate plumbing path, so it seats correctly the first time without leaks. Generic universal drain fittings may require adapters, hand-trimming, or extra sealant and can introduce leak points that trip the pressure switch. For a clean, factory-spec repair we recommend the OEM part.
Replacement is a basic DIY job. Power down the furnace at the disconnect, disconnect the condensate tubing, swap the drain angle, and reconnect — typically 15 minutes with no special tools. Inspect the drain trap and tubing for sediment while you're in there. If you are unsure about your furnace's drainage layout, consult a licensed HVAC technician.