OEM Carrier Gas Pressure Switch 6.5" WC for Model PG8JAA066110AGJA

This OEM Carrier gas pressure switch is the factory-specified replacement for the Carrier PG8JAA066110AGJA packaged gas unit. The pressure switch monitors negative pressure produced by the inducer motor to prove safe venting conditions before allowing ignition to proceed. When this switch fails or sticks open, the control board cannot confirm inducer operation and the furnace will lock out on a pressure switch fault — typically presenting as a no-heat call with the inducer running but ignition never beginning.

• OEM Part Numbers: HK02LB008 (Gas Pressure Switch) | HK06WC091 (Pressure Switch, SPST) | HK06WC100 (Pressure Switch w/ Bracket) — verify your unit's existing part number before ordering to ensure correct configuration
• Key Spec: 6.5" W.C. cut-out pressure | SPST switching | Factory-calibrated diaphragm | 24V control circuit compatible — matching the exact W.C. rating is critical; an incorrect pressure switch will cause nuisance lockouts or unsafe ignition sequencing
• Install Difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer or magnehelic gauge to verify hose integrity. Inspect the rubber sense hose for cracks or blockages before installing the new switch, as a failed hose is a common root cause.
• Warranty & Shipping: 1-year OEM factory warranty. Ships same business day from our warehouse — order by 3 PM local time for same-day dispatch.

Compatibility Note: Designed for the Carrier PG8JAA066110AGJA packaged gas unit. This switch also cross-references across select Bryant and Payne packaged units sharing the same inducer and venting configuration. Always confirm the W.C. rating and part number on your unit's existing switch or service literature before ordering. Not sure? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.