IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The 10728343 is a genuine OEM Goodman high-limit safety switch for WGGE4537A090MAA gas/electric package units. This bi-metal snap-disc control senses supply-air/heat-exchanger temperature and opens the heating circuit if the furnace exceeds its safe operating limit — protecting the heat exchanger from cracking due to restricted airflow, a dirty filter, or a failed blower. It is a primary safety device that works alongside the rollout and auxiliary limits on this platform.
The trip and reset temperatures of a limit switch must match the furnace it protects. A generic switch with the wrong calibration will either nuisance-trip in normal operation or allow the heat exchanger to overheat. The OEM 10728343 is set to Goodman's factory spec, giving you correct, reliable protection and clean cut-in/cut-out behavior.
Easy — usually two mounting screws and two spade connectors, mounted in the blower or supply-air path. Plan 15–20 minutes. Disconnect power before servicing. If the limit continues to trip after replacement, correct the airflow restriction — never jumper or bypass a limit switch.
Compatible model: WGGE4537A090MAA. Match part number 10728343 to your existing control before ordering.