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The 0130F00038 auxiliary limit switch is a genuine OEM thermal safety control for the Goodman/Amana AMH80905CXCB furnace and related 80% AFUE models. Identified by its light-blue body-color code, this normally-closed switch monitors temperature at the blower or secondary area and opens the circuit if the furnace overheats — protecting the heat exchanger and preventing unsafe operation. If your furnace trips on limit, blows cold air, or won't complete a heat cycle, a failed auxiliary limit is a frequent culprit.
The OEM 0130F00038 is factory-calibrated to the exact trip temperature for this furnace — critical for a safety device. Our generic equivalent matches the trip point and terminal layout at a lower cost. Because this is a safety component, we recommend OEM when available. Both are new.
Mounts with two screws and two spade terminals. Cut power first and note wire positions. Under 10 minutes for most DIYers. Never bypass or jumper a limit switch.
Verify the light-blue color code and part number for correct calibration. Support: info@nationalhvacparts.com.