OEM Carrier Pressure Switch HK02ZB038 — 22#CLS / 7#OPN, 50" Leads for Model PY1PEA042120ACBA

This is the genuine OEM Carrier pressure switch (part number HK02ZB038), factory-specified for the Carrier PY1PEA042120ACBA packaged unit. The pressure switch monitors the inducer/draft blower to confirm adequate venting before allowing ignition to proceed. When it fails or sticks, the furnace or packaged unit will lock out before a flame is ever established — a common symptom is the inducer running but the system never advancing to ignition, accompanied by a diagnostic fault code indicating an open pressure switch.

• Specs: Close pressure: 22" W.C. | Open pressure: 7" W.C. | Lead length: 50" | OEM Carrier part number: HK02ZB038 | Also cross-references as PS80-02-F0074
• OEM vs. Generic: This is a genuine Carrier OEM switch calibrated to exact factory W.C. ratings. Aftermarket pressure switches often carry ±15% tolerance on trip points, causing nuisance lockouts or — worse — allowing the system to fire without proper draft pressure, creating a safety hazard.
• Install Difficulty: 2/5 — The pressure switch is typically accessible once the front panel is removed. Tools needed: 1/4" nut driver, flathead screwdriver, and a manometer if verifying inducer pressure. Always confirm system power is off before disconnecting wiring. Photograph all hose and wiring connections before removal.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed and factory-matched for the Carrier PY1PEA042120ACBA packaged unit. Verify W.C. ratings on your existing switch and match to your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get your system back on within 24 hours.