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The genuine Goodman 0130F00036 Limit Switch (Pink) is a factory-spec high-limit safety control for the ACSS921005CNAA gas furnace. Color-coded pink to denote its specific trip temperature, this normally-closed thermal switch opens the control circuit if the heat exchanger or plenum exceeds a safe temperature — shutting down the burner to prevent overheating, cracked heat exchangers, and fire hazards. A failed or nuisance-tripping limit causes the furnace to short-cycle or stop heating entirely.
The pink color code is critical — it identifies the exact cut-out/cut-in temperature engineered for this furnace's airflow and heat-exchanger design. Installing a generic limit with the wrong trip point can either trip prematurely (no heat) or fail to protect the unit. This genuine Goodman OEM switch guarantees the correct temperature rating and bracket fit.
Easy (1/5). Disconnect power, remove the two spade wires, back out the mounting screws, and install the replacement in the same orientation. Confirm the pink color and part number match before fitting. A 10-minute job for most DIYers and technicians. Never bypass a limit switch — replace it with the correct part.