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The Goodman 0161F00046 is an OEM condensate drain trap engineered for high-efficiency condensing furnaces such as the AMSS920603BNAA. In a 90%+ AFUE furnace, combustion produces acidic condensate that must drain away safely; this trap maintains the water seal that lets condensate exit while blocking flue gases from backing up into the cabinet. A cracked, clogged, or brittle trap causes water leaks, pressure-switch lockouts, and nuisance no-heat codes.
The genuine Goodman trap matches the exact inlet/outlet geometry and internal barrier design of the original, so it seats without adapters and passes the furnace's self-diagnostic pressure checks. Universal traps frequently trigger pressure-switch faults due to differing internal restriction. OEM avoids that guesswork.
Easy–Moderate (2 of 5) — Power down the furnace, disconnect the drain lines, remove the old trap, flush the drain, and install the new trap. Prime it with water before restarting so the seal is established. Roughly 20–30 minutes.