OEM Carrier Furnace Draft Air Pressure Switch for PY2PPB048115AB

The draft air pressure switch is a safety device that confirms the inducer (draft) motor is actually moving combustion air and that the venting is clear before the control board allows the furnace to ignite on your Carrier PY2PPB048115AB. It senses negative pressure through a small rubber hose; if proper draft isn't proven, ignition is blocked. When the switch fails or its hose or sensing port clogs, you'll see the inducer spin up but the furnace never lights (no heat), or it short-cycles, usually accompanied by a fault code for an open pressure switch. This is a normally-open pressure switch with a factory-set trip point measured in inches of water column (commonly in the 0.40–0.85" WC range for this class of furnace), with the correct hose port and electrical terminals. The set point and stage configuration are matched to the Carrier draft system. A generic switch with the wrong WC trip point either won't close (you get no ignition at all) or closes when draft is actually inadequate — which is dangerous, because it defeats the very safety that prevents firing into a blocked flue. The OEM switch is calibrated to Carrier's specification so it proves draft accurately every cycle. Install difficulty: 2/5. Tools needed: 1/4" nut driver and, ideally, a manometer to verify draft after replacement. #1 SAFETY WARNING: Shut off power at the breaker and the gas supply 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 PY2PPB048115AB. 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.