OEM Carrier High Pressure Switch HK02ZA442 for Model FIOP200E511GA

This OEM high pressure switch (part number HK02ZA442) is the factory-specified replacement for the Carrier FIOP200E511GA packaged unit. The pressure switch monitors the inducer motor's ability to create adequate negative pressure (draft) in the heat exchanger flue path. When the inducer reaches the correct speed and airflow, the pressure switch closes, signaling the control board to proceed with ignition. A failed or out-of-calibration pressure switch causes the furnace or packaged unit to lock out before ignition — typically throwing a fault code related to pressure switch stuck open or inducer failure.

• Specs: High pressure switch configuration | Factory-calibrated W.C. (water column) rating matched to FIOP200E511GA | Single-port or dual-port hose fitting as equipped from factory | OEM part number HK02ZA442
• OEM vs Generic: OEM pressure switches are pre-set to the exact W.C. rating required by your unit's heat exchanger design. Generic or off-brand switches frequently carry wider tolerances, risking nuisance lockouts or — more dangerously — failure to detect a true blocked flue condition.
• Install Difficulty: 3/5 — Shut off power and gas before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, manometer (recommended to verify W.C. rating post-install). Inspect inducer hose and port for cracks or blockages before installing the new switch, as these are common root causes of switch failure.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier FIOP200E511GA packaged unit. Always verify the W.C. rating stamped on your existing switch against your unit's wiring diagram before installation. If you have questions about fitment, our HVAC parts specialists confirm compatibility before your order ships — no guesswork required.