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The B1370145 is a genuine OEM 300°F manual-reset flame-rollout limit switch for the Goodman GMV80704BXBA 80% AFUE gas furnace. Mounted on the burner assembly, this critical safety control trips and shuts off the gas valve if flames roll out of the combustion chamber — a condition caused by blocked heat exchangers or poor venting. If your furnace locks out on a rollout fault or the button has tripped, inspect the cause and replace a failed switch with an exact OEM match.
Rollout switches are life-safety devices calibrated to a precise trip point. OEM guarantees the correct 300°F rating, terminal style, and mounting bracket. Generic substitutes with the wrong setpoint can nuisance-trip or, worse, fail to protect. Always use OEM for safety controls.
Easy (2/5). Disconnect two spade terminals and remove the mounting screws. Never bypass a rollout switch — if it keeps tripping, diagnose the heat exchanger and venting first. Shut off gas and power before servicing.
Compatible with Goodman GMV80704BXBA furnaces. Confirm temperature rating and part number before ordering.