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The Goodman B1370155 Auxiliary Limit Switch is a genuine OEM safety control engineered for AMH81405DXAA gas furnaces and compatible Goodman/Amana models. This normally-closed thermal switch opens at approximately 120°F to protect the heat exchanger and blower compartment from unsafe overheating conditions, shutting down the burners if airflow is restricted or a blower fault occurs.
The genuine OEM B1370155 is factory-calibrated to the exact trip point your furnace's control board expects, ensuring proper safety cutout timing and full warranty compatibility. Aftermarket universal switches may carry a loose temperature tolerance or incorrect mounting bracket, risking nuisance shutdowns or an unsafe reset point. For a safety-critical component like a limit switch, OEM is strongly recommended.
Easy (1/5). This is a two-wire, single-fastener replacement. Disconnect power at the furnace disconnect, remove the failed switch, transfer the wire leads (or bracket) to the new B1370155, and remount. Most homeowners with basic HVAC knowledge can complete this in under 15 minutes. Always verify power is off before servicing.
Order the authentic Goodman B1370155 today to restore safe, reliable furnace operation.