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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM safety component engineered for the AMVC951155DXAA 95% AFUE variable-speed modulating furnace. This limit switch continuously monitors heat-exchanger temperature and shuts down the burners if the furnace overheats, protecting your equipment and your home from unsafe operating conditions. A failed primary limit is one of the most common causes of a furnace that short-cycles, blows cold air, or locks out entirely.
Choosing this genuine OEM Goodman part guarantees an exact temperature trip point and mounting fit — critical for a safety device. Generic universal limits may carry a lower price, but incorrect calibration can cause nuisance lockouts or, worse, fail to protect the heat exchanger. For a component this important to safety, OEM is strongly recommended.
Easy to Moderate. The limit mounts to the heat-exchanger housing with two screws and a simple two-wire connection. Most handy homeowners can complete the swap in 15–20 minutes. Always shut off gas and power before servicing, and if you are unsure about wiring or the cause of a limit trip, consult a licensed HVAC technician.