OEM Carrier LP Gas Pressure Switch HK02LB008 / HK06WC091 for Model PG8JEA048090ACJA

This is the OEM-specification LP (propane) gas pressure switch for the Carrier PG8JEA048090ACJA packaged gas unit. The pressure switch proves that the draft inducer is operating correctly before allowing the gas valve to open — it is a critical safety interlock in your furnace's sequence of operation. When this switch fails or sticks open, the control board cannot confirm inducer operation and will lock out the furnace, typically before any ignition attempt. Common symptoms include a blinking fault code indicating a pressure switch fault, the inducer running but no ignition occurring, or a no-heat call that resets itself after a power cycle only to fail again.

• OEM Part Numbers: HK02LB008 (Gas Pressure Switch) | HK06WC091 (Pressure Switch) — both superseded numbers covered by this listing. Cross-reference: GFS3451-4036.
• Specs: LP / Propane-rated pressure switch | Cut-out pressure: 6.5" W.C. | SPST configuration | Factory-matched set point | Fits Bryant, Carrier, and Payne branded equipment sharing the same platform.
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact W.C. (water column) tolerances. Generic aftermarket switches frequently drift from their rated set point, causing nuisance lockouts or — more dangerously — failing to open when the inducer is actually under-performing. For a safety-critical component like this, OEM specification is strongly recommended.
• Install difficulty: 2/5 — Shut off power and gas supply before beginning. Tools needed: 1/4" nut driver, needle-nose pliers, and a short length of replacement hose if the existing tubing is cracked or brittle. Photograph all hose and wiring connections before removal. Always run a full call-for-heat cycle to confirm the switch proves correctly after installation.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JEA048090ACJA packaged gas/electric unit. Also fits select Bryant and Payne models sharing this pressure switch specification — verify the W.C. rating on your existing switch or unit data plate before ordering. Note: HK02LB008 has been superseded; HK02MB008 is the current OEM direct replacement and is the unit shipped. Questions about fitment? Our HVAC parts specialists verify compatibility before your order ships.