Product Name
$0.00
✅ In Stock
🚚 Ships Today
🔒 OEM Certified
🔄 30-Day Return
Same-day dispatch if ordered by 3PM CST
Free shipping on orders $75+
Check compatibility before ordering
IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman 20269903 Auxiliary Limit Auto-Reset Switch is a genuine OEM safety control for GMV81155CXA 80% two-stage variable-speed furnaces. This auxiliary high-limit switch monitors temperature in its mounting location and opens the control circuit if the furnace overheats — shutting down the burners to prevent heat-exchanger and cabinet damage. Because it is an auto-reset switch, it re-closes on its own once the temperature returns to a safe range. Repeated tripping usually points to restricted airflow (dirty filter, blocked return, or failing blower) rather than a bad switch, so confirm airflow before condemning the part.
Limit switches are safety devices calibrated to a specific trip temperature and mount profile. A generic switch with a different setpoint or terminal layout can nuisance-trip or, worse, fail to protect the furnace. The genuine Goodman 20269903 is factory-calibrated for this cabinet, ensuring the switch trips exactly when the OEM design intends. Aftermarket equivalents exist but should match the exact rating — the OEM part removes that guesswork.
Easy to Moderate. Remove the two mounting screws, transfer the wire terminals, and mount the new switch in the same orientation. About 15 minutes with a nut driver. Disconnect furnace power and verify zero voltage first, and inspect airflow to rule out the root cause of any overheating.