OEM Goodman 150°F Primary Limit Switch for GMH950703BXAF — 20162903

Goodman 20162903 Primary Limit Switch (150°F)

The Goodman 20162903 primary limit switch is a factory OEM safety control designed for the GMH950703BXAF 95% AFUE multi-speed gas furnace. Mounted on the heat exchanger vestibule, this normally-closed thermal switch opens at approximately 150°F to shut down the burners if the plenum overheats, protecting the furnace from cracked heat exchangers, restricted airflow, and dirty filters. A failed or drifting limit switch is a leading cause of short-cycling and no-heat calls.

Specifications

• Function: Primary high-temperature limit (manual/auto-reset thermal)
• Open temperature: 150°F
• Electrical: Line-voltage safety circuit
• Fitment: Goodman/Amana GMH95, GKS9, and related 95% furnaces using 20162903
• OEM Part #: 20162903

OEM vs. Generic

The OEM Goodman 20162903 is calibrated to the exact trip point your furnace's control board expects, ensuring correct safety timing. Our generic-equivalent option delivers the same 150°F rating and mounting footprint at a lower price point — a smart choice for out-of-warranty units where budget matters. Both are new, tested components.

Installation Difficulty

Easy (1 of 5). Two mounting screws and two spade terminals. Always cut power at the disconnect before servicing. Most DIYers complete this in under 15 minutes; verify the root cause (airflow/filter) so the replacement switch doesn't trip again.