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The Goodman 0130F00036 Limit Switch (Pink) is a genuine OEM high-temperature safety control for the Goodman ADSS800403AXAB gas furnace and compatible models. The limit switch monitors heat-exchanger temperature and opens the circuit to shut off the burners if the furnace overheats — protecting against restricted airflow, a failed blower, or a dirty filter. The pink color code identifies its specific temperature trip rating for this application.
The OEM limit switch is calibrated to the exact open/close temperatures Goodman specifies for this heat exchanger. Because this is a safety device, using a generic switch with a different trip point can cause nuisance shutdowns or, worse, fail to protect the furnace. The color-coded OEM part guarantees the correct rating.
Easy — Two mounting screws and two spade terminals. Cut power to the furnace, match the color code, and swap. Verify the furnace cycles normally and does not trip on limit after installation.