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The Goodman 0130F00036 primary limit switch — identified by its pink color code — is a genuine OEM safety control for the Goodman GDH80403AXBA gas furnace and compatible models. The high-limit switch monitors heat-exchanger and plenum temperature. If airflow is restricted (dirty filter, failed blower) and the furnace overheats, this switch opens the circuit and shuts down the burners to protect the equipment and your home.
The pink color code denotes a specific factory temperature trip point — using the wrong rating is a safety hazard. This genuine OEM switch guarantees the correct cut-out and reset temperatures, mounting flange, and terminal spacing. Generic substitutes risk nuisance trips or, worse, failing to trip. Always match the OEM color/part number.
Easy (1/5) — Two mounting screws and two spade terminals. Disconnect power first. A quick 10–15 minute repair for most DIYers.