OEM Carrier Air Pressure Switch for Furnace PG8UAA060135ACJA

The air pressure switch is the safety device that confirms your Carrier PG8UAA furnace has proper combustion draft before any gas is allowed to flow. When the inducer motor starts, it creates negative pressure sensed through a rubber hose to this switch; only when the diaphragm closes the contacts will the control board proceed to energize the igniter and gas valve. When the switch fails, sticks open, or its port clogs, the furnace will start the inducer and then lock out with no ignition — you'll notice short-cycling, repeated inducer starts, cold air, and a diagnostic LED flashing a pressure-switch fault code. This OEM normally-open switch is calibrated to the exact actuation point (measured in inches of water column, "W.C.) specified for the PG8UAA's vent configuration. The set point is matched to the furnace's inducer and flue design so it trips and resets at the correct draft, neither nuisance-tripping nor failing to verify safe venting. Why OEM matters here: a pressure switch with the wrong set point is a genuine safety issue. Generic switches with looser calibration tolerances may close on insufficient draft — allowing the burners to fire when the flue is partially blocked — or refuse to close on a perfectly healthy system, causing endless lockouts. The OEM set point is the only one validated against this furnace's combustion engineering. Install difficulty: 2 of 5. Tools needed: 1/4" nut driver and a multimeter to confirm continuity. #1 safety warning: SHUT OFF THE GAS and kill power at the breaker first, and inspect the sensing hose and port for condensate or debris before condemning the switch. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model PG8UAA060135ACJA. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.

Shipping & Returns

Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.