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The Goodman B1370819 is a genuine OEM blower door safety interlock switch for the GUP080-4 gas furnace and compatible Goodman/Amana models. Mounted at the blower compartment, this switch cuts power to the furnace whenever the access panel is removed, preventing operation with the door open. It's a required safety device that protects service technicians and homeowners from live electrical and moving blower components.
The OEM Goodman door switch matches the exact mounting bracket, plunger height, and contact rating of the original, so the panel seats correctly and the switch actuates reliably. Generic switches often have the wrong plunger travel, leaving the furnace dead or unsafely bypassed. Choose OEM for a guaranteed, safe fit.
Easy — a 10–15 minute repair. Disconnect power, unplug the two wires, remove the mounting screws, install the new switch, and confirm the plunger depresses fully when the blower door is reinstalled.