OEM Carrier Dual Pressure Switch -0.75"WC / -0.30"WC for Model PG92SCS48060BAAA

This OEM dual pressure switch assembly is the factory-specified replacement for the Carrier PG92SCS48060BAAA 92% AFUE packaged gas furnace. Originally sold under part number HK06NB020 and superseded by the current OEM replacement HK06MB020, this switch performs two simultaneous jobs: it monitors the low-pressure side of the inducer (–0.30" W.C.) and the high-pressure side (–0.75" W.C.) to prove that the draft inducer is creating adequate negative pressure before allowing the control board to proceed to ignition. When this switch fails or sticks open, the furnace control board detects a pressure fault and locks out — typically before the gas valve ever opens. Common symptoms include a furnace that starts the inducer motor, then shuts off after a few seconds with a pressure switch fault code, or a unit that runs the inducer continuously but never advances to ignition.

• Specs: Dual setpoint — –0.75" W.C. (high-pressure switch) / –0.30" W.C. (low-pressure switch) | SPST Normally Open contacts | OEM part HK06MB020, supersedes HK06NB020 | Factory-matched diaphragm sensitivity
• OEM vs Generic: This is a genuine Carrier OEM assembly engineered to exact diaphragm tension tolerances. Aftermarket pressure switches often drift ±15% from setpoint over time, causing nuisance lockouts or — worse — allowing ignition under unsafe draft conditions. OEM is always the recommended choice for gas-appliance safety components.
• Install difficulty: 2/5 — Swap is straightforward with basic hand tools. Turn off power and gas before beginning. Label and photograph all hose connections (typically two rubber tubing ports) and the low-voltage spade terminals before removal. Blow out hoses with compressed air during replacement to clear any moisture or debris. No calibration required — factory-set at manufacture.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Verified fit for Carrier model PG92SCS48060BAAA packaged gas furnace and related PG92S-series models. Always confirm the W.C. setpoint rating on your existing switch or unit data plate before ordering to ensure a direct match. Our fitment team is available to verify compatibility before you purchase — reach out before checkout if you have any questions.