OEM Carrier Gas Pressure Switch 6.5" WC for Model PG8JAA048135AEJA

This OEM gas pressure switch (part number HK02LB008, also covering HK06WC091) is the factory-specified replacement for the Carrier PG8JAA048135AEJA packaged gas/electric unit. The pressure switch is a safety device that monitors the negative pressure (draft) created by the inducer motor. If the inducer fails to produce sufficient vacuum — or if there is a blocked flue, cracked hose, or failed inducer motor — the pressure switch keeps the gas valve locked out, preventing unsafe operation. A faulty pressure switch is one of the most common causes of a furnace that starts the inducer but never advances to ignition, leaving you with a blinking fault code and no heat.

• Specs: 6.5" WC cut-out pressure | Compatible with air, natural gas, and LP gas applications | SPST switch configuration | Mounts horizontally or vertically for flexible installation
• OEM vs Generic: This is a genuine Carrier OEM part with factory-calibrated setpoint tolerance. Generic aftermarket switches frequently drift from rated WC settings, causing nuisance lockouts or, worse, failing to trip under unsafe conditions — a critical safety risk on gas equipment.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: ¼" nut driver, needle-nose pliers, and a manometer (recommended to verify WC setpoint after install). Always label or photograph hose and wire connections before removal. Test inducer vacuum before condemning the switch.
• Warranty & Shipping: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Fits Carrier model PG8JAA048135AEJA packaged gas/electric units. OEM part number HK02LB008 supersedes HK06WC091; both numbers are covered by this listing. Verify the 6.5" WC rating and hose port configuration on your existing switch before ordering. Have questions about fitment? Our HVAC parts team confirms compatibility before you buy.