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The Goodman/Amana 0130F00038 is the light-blue auxiliary limit switch fitted to the AMVC80803BNBD and related Goodman/Amana 80% AFUE gas furnaces. This secondary safety control protects a specific zone of the furnace — such as the blower compartment or a supplemental heat-exchanger area — by opening the control circuit if temperatures exceed the switch's rated trip point. The color coding (light blue) identifies its unique temperature calibration, so matching the exact part is important.
Auxiliary limits are calibrated to a precise opening temperature indicated by their color code. Installing the wrong trip point — easy to do with generic parts — can cause nuisance shutdowns or, worse, defeat the intended protection. This genuine OEM light-blue switch guarantees the correct calibration and bracket fit.
Rating: Easy (2/5). Typically a 15-minute swap with a nut driver and by disconnecting two spade terminals. Always disconnect power and gas before servicing. If the switch keeps tripping after replacement, investigate airflow restrictions or a blower fault rather than bypassing the safety.