OEM Goodman Primary Limit Control for AMSS921205DNAA — 20162904

Goodman 20162904 Primary Limit Temperature Control

The Goodman 20162904 is a genuine OEM primary high-limit temperature control designed as a direct-fit replacement for the AMSS921205DNAA furnace and related Goodman/Amana models. Mounted on the heat exchanger or blower deck, this limit senses supply-air temperature and shuts down the burners if airflow is lost or the plenum overheats — protecting the heat exchanger from thermal damage and preventing dangerous over-firing.

Specifications

• Part type: Primary high-limit temperature control
• Reset style: Automatic reset (snap-disc)
• Fits: Goodman & Amana furnaces including AMSS921205DNAA
• Function: Supply-air over-temperature cutoff
• Mount: Deck / heat-exchanger bracket with factory temperature calibration
• Brand: Genuine Goodman OEM

OEM vs. Generic

This control's trip temperature is matched to your furnace's heat exchanger design. A genuine OEM limit guarantees the correct set point and bracket geometry, so the burners cut out at the right temperature every time. Generic substitutes with a different set point can cause short-cycling on limit or, if set too high, allow damaging heat build-up. For the primary safety limit, always choose OEM.

Installation Difficulty

Rating: Easy–Moderate (2.5/5). Plan on 15–25 minutes. Cut power to the furnace, note and photograph the wire connections, remove the mounting screws, and swap the control into the same position and orientation. Confirm the sensing element sits in the airflow exactly as the original did. If the furnace trips on limit after replacement, check the blower, filter, and ductwork for airflow restriction before assuming a part fault.

De-energize the unit before servicing. Consult a licensed HVAC technician if you are unsure.