OEM Carrier Pressure Switch (22" CLS / 7" OPN) for Model PY1PNA060100AEBA — HK02ZB038

This is the factory OEM replacement pressure switch for the Carrier PY1PNA060100AEBA packaged unit. The pressure switch monitors the inducer blower's draft pressure to confirm safe combustion venting before allowing ignition to proceed. When this switch fails or sticks open, the control board will lock out the system before the gas valve ever opens — resulting in a furnace or packaged unit that attempts a heating cycle but never lights, often accompanied by a diagnostic fault code indicating a pressure switch error.

• Specs: Close set point: 22" W.C. | Open set point: 7" W.C. | Lead wire length: 50" | OEM Part Number: HK02ZB038 | Also cross-references as PS80-02-F0074
• OEM vs Generic: This is a genuine Carrier OEM switch calibrated to factory tolerances. Aftermarket pressure switches frequently drift from their rated set points, causing nuisance lockouts or — worse — allowing ignition under unsafe draft conditions. Always replace with OEM on a sealed combustion system.
• Install Difficulty: 2/5 — Power down the unit and allow the inducer to cool. Disconnect the two wiring leads (photograph first), remove the single mounting screw, and swap the hose barb tubing. Torque the mounting screw snugly but do not overtighten the plastic housing. Tools needed: flat-head screwdriver, needle-nose pliers, multimeter for post-install verification.
• Warranty: 1-year OEM manufacturer's warranty against defects. Orders placed before 3PM ship same business day from our warehouse.

Compatibility: Designed and factory-spec'd for the Carrier PY1PNA060100AEBA packaged gas/electric unit. Verify your unit's existing switch set points (stamped on the switch body) match 22" CLS / 7" OPN before ordering. Cross-reference part number PS80-02-F0074 is also valid for this switch. Have a question about fitment? Our HVAC-certified parts team confirms compatibility before you order — ships same day.