OEM Carrier Pressure Switch HK02ZB038 for Model PY1PNA042060ADBA

This OEM pressure switch (part number HK02ZB038) is the factory-specified replacement for the Carrier PY1PNA042060ADBA packaged unit. The pressure switch proves that the inducer motor is operating and creating adequate draft before allowing the ignition sequence to proceed. When this switch fails or sticks, the control board cannot confirm safe venting conditions, and the furnace will lock out on a pressure fault — delivering no heat even though the inducer motor may be running.

• Specs: Closes at 22" W.C. | Opens at 7" W.C. | 50" lead wires | Single-port diaphragm-style switch | Factory-calibrated setpoint
• OEM vs Generic: This is a genuine Carrier OEM switch (HK02ZB038), calibrated to the exact W.C. rating required by the PY1PNA042060ADBA. Aftermarket pressure switches frequently carry ±5–10% W.C. variance, which can cause nuisance lockouts or — worse — allow ignition under marginal draft conditions.
• Install difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers. Remove the rubber hose from the inlet port, disconnect the two-wire connector, and unscrew the mounting bracket. Reverse to install. Confirm hose and port are free of condensate blockage before reinstalling.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1PNA042060ADBA packaged gas/electric unit. Always verify the W.C. rating (22#CLS / 7#OPN) against your unit's wiring diagram or existing switch label before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.