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The Goodman 20162903 Primary Limit Switch is a genuine OEM high-temperature safety control designed to protect your Amana AMES960805CUAA 96% AFUE gas furnace from overheating. When heat exchanger temperatures exceed the 150°F trip point, this normally-closed switch opens to shut down the burners, preventing damage to the heat exchanger and the surrounding cabinet.
Our genuine OEM 20162903 is calibrated to the exact factory trip point and reset differential, guaranteeing correct furnace lockout behavior. Aftermarket replacements may drift from the 150°F spec, causing nuisance shutdowns or, worse, delayed protection. For a safety-critical limit control we always recommend OEM.
Easy (2/5) — Two wire leads and one or two mounting screws. Always disconnect power at the breaker before service; a multimeter continuity check confirms the old switch has failed open before replacement.