OEM Carrier Pressure Switch HK02ZB038 — 22#CLS / 7#OPN, 50" Leads for Model PY1PNA036080ACBA

This is the genuine OEM Carrier pressure switch (part number HK02ZB038), factory-specified for the Carrier PY1PNA036080ACBA packaged unit. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe venting before allowing ignition to proceed. When it fails or sticks open, the control board interprets this as a venting fault and locks out the system — resulting in a no-heat condition, often with a flashing fault code indicating a pressure switch error. The inducer motor will run, but the furnace will never advance past that stage.

• Specs: Closes at 22" W.C. | Opens at 7" W.C. | 50" lead length | Single-port design | Factory-calibrated setpoints — no field adjustment required
• OEM vs Generic: This is a genuine Carrier OEM part with exact factory-matched setpoints (±1% W.C.). Aftermarket switches frequently carry wider tolerances that can cause nuisance trips or, worse, allow ignition under unsafe draft conditions.
• Install difficulty: 2/5 — Power down and confirm inducer is de-energized before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended to verify draft pressure post-install). Disconnect the single hose port and two-wire harness, swap the switch, and re-seal the hose barb fitting snugly.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse — order by 3 PM local time for guaranteed same-day dispatch.

Compatibility: Engineered and factory-specified for Carrier model PY1PNA036080ACBA. Verify your existing switch reads 22#CLS / 7#OPN on the label before ordering — other W.C. ratings use different part numbers. Not sure? Contact our fitment team before you buy and we'll confirm compatibility at no charge. In stock and ready to ship today.