OEM Carrier Furnace Air Pressure Switch for PG8DAA060115AAJA

The air pressure switch is a safety device that confirms the draft inducer is actually moving combustion gases before the furnace is allowed to light. On the Carrier PG8DAA060115AAJA, a small hose connects the switch to the inducer housing; when the inducer pulls enough negative pressure, the switch closes and tells the control board it is safe to energize the igniter and open the gas valve. When the switch fails, or a flue or hose is blocked, the inducer runs but the burners never ignite and the furnace locks out, because the board never sees the switch close. A switch stuck closed is dangerous and should fault on the safety self-check. This is a normally-open negative-pressure switch with a calibrated set point measured in inches of water column (commonly around -0.40 to -0.70 in. w.c., stamped on the switch body). The rating must match the original exactly. Test with a manometer, and check continuity with a multimeter: open with the inducer off, closed with it running. OEM matters because the trip set point is specific to this furnace's flue length and inducer. A generic switch with the wrong in. w.c. rating will either nuisance-trip (no heat) or, worse, close too easily and allow ignition during a venting fault, defeating the safety. Aftermarket diaphragms also fatigue faster. Install difficulty: 2/5. Tools: 1/4" nut driver, nut driver, and a manometer or multimeter. SAFETY: turn off power at the breaker and shut off the gas before servicing, and never jumper or bypass a pressure switch to 'test' a furnace. 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 PG8DAA060115AAJA. 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.