OEM Carrier Pressure Switch with Bracket (HK06WC090) for Model PG8DAA036050ABJA

This OEM pressure switch with mounting bracket is the factory-specified replacement for the Carrier PG8DAA036050ABJA packaged gas furnace. The pressure switch monitors negative pressure generated by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or sticks, the control board receives no proof-of-draft signal and locks out the furnace entirely — leaving you with no heat and often a diagnostic fault code pointing to inducer or pressure circuit failure.

• Specs: 0.18" W.C. (inches water column) setpoint | SPST (Single-Pole, Single-Throw) | Includes factory mounting bracket | OEM part number HK06WC090 | Replaces HK06WC072, HK06WC074, HK06WC076, HK660001, 310315-751, 310315-752, 326750-751
• OEM vs Generic: This is a genuine Carrier OEM part built to exact factory W.C. tolerances. Aftermarket switches frequently carry wide pressure tolerances that cause nuisance lockouts or, worse, allow the furnace to fire with inadequate draft — a potential carbon monoxide risk.
• Install difficulty: 2/5 — Shut off power and gas before starting. Tools needed: flathead screwdriver, needle-nose pliers, and a manometer (recommended to verify switch setpoint after install). Disconnect the hose and two wire leads, unbolt the bracket, swap the switch, and reconnect in reverse order.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8DAA036050ABJA packaged gas furnace. Also fits related PG8DAA and PG8UAA series models sharing the 0.18" W.C. pressure specification — always verify the W.C. rating on your existing switch before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back up fast.