IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman B1370155 is a genuine OEM 120°F auxiliary limit switch for the GDS80904BXA gas furnace. This secondary high-limit control monitors blower compartment and heat exchanger temperature, opening the circuit to shut off the burners if airflow is restricted — typically from a clogged filter, blocked return, or failing blower. It's a key overheat safeguard that prevents heat exchanger damage.
The OEM Goodman B1370155 matches the precise 120°F set point, bracket geometry, and terminal layout of the original control. A generic replacement with a different trip point can cause nuisance shutdowns or, worse, fail to protect the furnace. For proper safety operation, choose OEM.
Easy (2/5). Disconnect furnace power, pull the wire terminals, remove the two mounting screws, and install the replacement in the same orientation. Roughly 15 minutes. Replace a dirty filter to prevent repeat trips.