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The Goodman 0130F00035 Primary Limit Switch (purple) is a genuine OEM safety control engineered for the Goodman GDH80403AXAA gas furnace and compatible 80% AFUE models. This high-limit switch continuously monitors heat-exchanger and plenum temperatures, shutting down the burners if the furnace overheats to protect your equipment and home. A failed primary limit is a common cause of short-cycling, no-heat calls, and lockout faults.
This OEM Goodman switch is factory-calibrated to the exact trip and reset temperatures your furnace's control board expects — critical for a safety component. Generic aftermarket limits may have loose temperature tolerances that cause nuisance trips or, worse, fail to protect the heat exchanger. For a safety-rated part, we recommend genuine OEM.
Moderate — Requires removing the burner-compartment door and disconnecting two spade terminals. Always shut off gas and power at the disconnect before servicing. A basic multimeter (continuity check) confirms diagnosis. Most experienced DIYers complete this in 20–30 minutes; if you are unsure, contact a licensed HVAC technician.