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This genuine OEM Goodman 0130F00000P is a -1.10 inch water-column (WC) draft-proving pressure switch, identified by its Sun Gold housing, used on the GMS950453BXA 95% AFUE gas furnace. The pressure switch confirms that the induced-draft blower is establishing proper venting before the burners are allowed to fire — a critical safety interlock. A failed or drifting switch is a leading cause of no-heat calls, ignition lockouts, and error codes tied to draft proving.
Pressure switches are calibrated to an exact setpoint — here, -1.10" WC. The OEM 0130F00000P is factory-matched to your furnace's draft characteristics, so it proves and de-proves at the correct pressures. A generic switch with a slightly different setpoint or port configuration can cause short cycling, false lockouts, or, worse, allow firing under improper draft. For a safety component, always use the genuine calibrated part.
Easy to Moderate (2 of 5). Typically a 15–20 minute job: cut power and gas, note the tubing orientation, transfer the hose(s) to the matching ports, and swap the two spade wire connections. Confirm the furnace proves draft and fires normally after installation.