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The Goodman 20162904 Primary Limit Temperature Control is a factory OEM high-limit safety switch engineered for the AMVC81005CXAA two-stage variable-speed gas furnace. This normally-closed thermostatic switch continuously monitors the temperature of the heat exchanger and supply-air plenum. If airflow is restricted or the blower fails, the control opens and de-energizes the gas valve, preventing dangerous overheating and protecting the heat exchanger from cracking.
This is a genuine Goodman OEM control with the exact trip point and reset temperature specified for your furnace. Generic "universal" limits often carry a different set point, which can cause nuisance lockouts or fail to trip at the correct temperature. For a safety-critical component, OEM is the recommended choice.
Rated 3 of 5. Replacement requires shutting off gas and 120V power, removing the blower door, and transferring two spade connectors. Basic hand tools are sufficient, but because this is a combustion safety device, confirm proper seating and a clean electrical connection before restoring power. If you are not comfortable working around the gas valve, use a licensed HVAC technician.
Every order ships as a new, exact-fit OEM part backed by our fit guarantee for the AMVC81005CXAA platform.