OEM Carrier High Pressure Switch HK02ZA442 for Model FIOP200F511GA

This OEM high pressure switch (part number HK02ZA442) is the factory-specified replacement for the Carrier FIOP200F511GA packaged or split system unit. The pressure switch is a critical safety component that monitors system refrigerant or flue pressure to confirm proper operation before allowing the control board to advance through the heating or cooling sequence. A failed pressure switch will cause the system to lock out before ignition, display a fault code, or prevent the inducer motor from completing its proving cycle — leaving you with no heat or no cooling.

• Specs: High pressure switch | OEM part number HK02ZA442 | Factory-calibrated W.C. (water column) trip point | Normally open (N.O.) configuration | Direct factory replacement
• OEM vs Generic: OEM pressure switches are calibrated to the exact trip and reset points required by the Carrier FIOP200F511GA control board. Off-spec generic switches can nuisance-trip in cold weather or, worse, fail to trip under actual fault conditions — creating a safety hazard.
• Install difficulty: 3/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, manometer (for verification). Photograph existing hose connections and wiring before removal. Verify new switch trip point matches the original data plate specification.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.

Compatibility: Engineered and tested for the Carrier FIOP200F511GA. Always cross-reference the W.C. rating stamped on your existing switch against the replacement before installation. If you have questions about fitment, our HVAC parts specialists verify compatibility before you order — no guesswork. In stock and ready to ship today.