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The Goodman 0161F00046 Condensate Drain Trap is a genuine OEM component for the VMES960803BNAA high-efficiency (96% AFUE) modulating gas furnace. On condensing furnaces, the secondary heat exchanger produces acidic condensate that must drain away while the trap's water seal blocks combustion gases from escaping through the drain line. A cracked, clogged, or missing drain trap causes water leaks, pressure-switch faults, and nuisance lockouts — making it a routine but essential replacement part.
This OEM Goodman trap is molded to the furnace's exact port spacing and tubing diameters, so it seals correctly and maintains the proper water column against combustion pressure. Generic or universal traps often require adapters and can develop leaks or fail to hold the seal, triggering pressure-switch errors. For leak-free, reliable drainage, use the factory part.
Power down the furnace, disconnect the condensate lines and any tubing to the pressure switch and inducer, remove the old trap, and install the replacement. Prime the trap with water before restarting and check for leaks. Expect 20-30 minutes.