OEM Carrier Furnace Pressure Switch for Model PG9MAB036080AASA

The pressure switch on your Carrier PG9MAB036080AASA packaged gas furnace is a combustion-safety device. Before the control board allows the gas valve to open and the igniter to fire, this switch must confirm that the induced-draft blower is pulling combustion gases through the heat exchanger and out the vent. It senses negative pressure through a small rubber hose tapped into the inducer housing. When the switch fails, its hose clogs, or the vent is restricted, the furnace will spin up the inducer, fail to prove draft, and lock out. Homeowners typically notice the inducer running for several seconds with no burner ignition, repeated short-cycling start attempts, a flashing fault code at the board, and ultimately no heat. This is a single, normally-open pressure switch that closes on negative pressure at a factory-calibrated set point measured in inches of water column ("W.C.). The set point and contact rating are matched specifically to this furnace's venting and inducer airflow. Carrier OEM switches hold their trip point tightly across temperature swings. OEM matters here because the set point is a safety threshold, not a guess. Generic aftermarket switches often ship with looser calibration; a switch that trips too easily causes nuisance lockouts on cold mornings or at altitude, while one that closes too readily can allow firing with inadequate draft — a carbon-monoxide risk. The correct OEM trip point keeps the safety interlock honest. Install difficulty: 2 of 5. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter to confirm continuity. #1 safety warning: kill power at the breaker before servicing, and never jumper or bypass a pressure switch to "force" the furnace to run. 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 PG9MAB036080AASA. 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.