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The Goodman 20197308 Air Pressure Switch is a genuine OEM safety control for the Amana/Goodman AMVM961155DXBA variable-speed condensing furnace. Rated at -.10 in. w.c. (normally open), this switch proves that the inducer/draft motor is establishing adequate flue draft before the control board allows ignition. If proper vacuum isn't sensed, the switch keeps its contacts open and locks out the burner — a core safety function that prevents firing without proper venting.
Pressure switches are calibrated to a specific set point and hose-port configuration. This genuine OEM switch is factory-matched to -.10 in. w.c. and the exact terminal/port layout of your furnace. Generic switches with an approximate rating can cause false lockouts or, worse, allow firing under weak-draft conditions. For a safety component, OEM is the only recommended choice.
Difficulty: Moderate. Cut power to the furnace, transfer the tubing and wire terminals to the identical ports on the new switch, and secure it to the bracket. A technician should verify the switch opens and closes at the rated pressure and confirm proper sequence-of-operation after replacement.
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