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The Goodman 0130F00505 Pressure Switch is a genuine OEM draft/air-proving switch rated at -0.70" WC, normally open (NO), for the Amana/Goodman AMES800403AXAA 80% AFUE gas furnace and compatible AMES80 models. The switch proves that the induced-draft (inducer) blower is producing adequate negative pressure before the control board allows ignition. A failed switch is a leading cause of ignition lockout and "furnace won't light" complaints.
Pressure-switch set points are precise. This genuine OEM switch is factory-calibrated to the -0.70" WC trip point specified for this furnace. A generic switch with the wrong pressure rating or NO/NC configuration will either fail to prove draft (no ignition) or prove it falsely (a serious safety concern). Match the exact rating stamped on the switch.
Difficulty: Easy to Moderate. With power off, transfer the rubber sensing hose and the electrical spade terminals to the new switch and remount with the original screws. Inspect the hose for cracks or condensate blockage while you're in there, as a plugged hose mimics a bad switch. About 15–20 minutes.
Backed by our fit guarantee for the AMES800403AXAA. Questions? Contact info@nationalhvacparts.com.