OEM Carrier High Pressure Switch HK02ZA442 for Model FIOP200B601GA

This is the factory OEM high pressure switch (part number HK02ZA442) designed specifically for the Carrier FIOP200B601GA unit. The pressure switch is a critical safety component that monitors system pressure to confirm the inducer motor is operating correctly before allowing ignition to proceed. When this switch fails or sticks open, the control board cannot verify safe venting conditions — resulting in a lockout, a no-heat condition, or a system that attempts ignition but never advances past the inducer proving stage.

• Specs: High pressure switch | OEM part HK02ZA442 | Factory-matched W.C. (water column) rating | Normally open (NO) configuration | Direct OEM replacement — no modifications required
• OEM vs Generic: OEM pressure switches are calibrated to the exact trip point required by the FIOP200B601GA heat exchanger and venting design. Off-spec generic switches can trip too early or too late, causing nuisance lockouts or — more dangerously — masking genuine venting failures.
• Install difficulty: 2/5 — Power down and lock out the unit before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended to verify trip point after install). Photograph existing hose routing before disconnecting pressure tubing.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our stocked warehouse.

Compatibility: This pressure switch is the direct OEM replacement for Carrier FIOP200B601GA. Always cross-reference the W.C. rating printed on your existing switch with the replacement before installation. If you have questions about fitment or need help confirming the correct part for your unit, our HVAC parts specialists verify compatibility before every order — reach out before you buy.