OEM Carrier Pressure Switch HK06WC091 for Model PG8JAA036110AAJA

This OEM pressure switch (part number HK06WC091) is the factory-specified replacement for the Carrier PG8JAA036110AAJA gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the inducer draft motor. Once the correct W.C. (water column) threshold is confirmed, the switch closes and signals the control board to proceed with ignition. When this switch fails — or the diaphragm cracks — the furnace will lock out before ever reaching the ignition stage, leaving you with a cold call and a blinking fault code.

• Specs: OEM part number HK06WC091 | Factory-rated W.C. setpoint | SPST normally-open | Direct fit for Carrier PG8JAA036110AAJA packaged gas furnace
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances from the factory. Off-brand substitutes often carry wider setpoint tolerances, risking nuisance lockouts or, worse, a switch that closes prematurely — a potential safety hazard in any gas appliance.
• Install Difficulty: 2/5 — Shut off gas and power at the disconnect before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer or magnehelic gauge to verify draft pressure. Always inspect the rubber hose port for cracks or blockages before condemning the switch itself.
• Warranty: 1-year OEM factory warranty. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PG8JAA036110AAJA packaged gas furnace. Confirm your unit's model and data plate W.C. rating before ordering. Not sure it fits? Our HVAC parts specialists verify fitment at no charge — contact us before you buy.