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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM temperature-actuated safety cutoff for the AMVC80805CNBC 80% AFUE gas furnace. This auxiliary limit opens the control circuit if temperatures in a monitored zone exceed the switch's trip point — protecting against overheating from restricted airflow, a failed blower, or a dirty filter. The light-blue color code identifies its specific trip temperature; installing the correct color is essential.
The OEM 0130F00038 is calibrated to Goodman's exact trip and reset temperatures for this furnace. A generic limit with the wrong setpoint can either nuisance-trip or, worse, fail to protect against a genuine overheat. For a safety device, always match the OEM part and color code.
Easy. Power off the furnace, note wire positions, remove the two mounting screws, transfer the terminals, and remount. Verify normal heating cycle and confirm the switch is not tripping under load.