OEM Carrier Pressure Switch HK02ZB038 for Model PY1PEA042080ACBA

This OEM pressure switch (part number HK02ZB038) is the factory-specified replacement for the Carrier PY1PEA042080ACBA furnace. The pressure switch is a critical safety component that proves inducer motor operation before allowing the ignition sequence to proceed. It monitors the negative pressure created by the draft inducer and closes its contacts only when that pressure falls within the correct range. When this switch fails or sticks open, the furnace will lock out on a pressure switch fault — typically before the burners ever light — leaving you with no heat.

• Specs: 22" W.C. close pressure | 7" W.C. open pressure | 50" lead wires | Single-port design | Factory-matched switching threshold
• OEM vs Generic: This is a genuine Carrier OEM switch calibrated to exact factory W.C. thresholds. Aftermarket substitutes often carry wider tolerances, leading to nuisance trips or, worse, failing to trip when they should — a safety risk in any induced-draft furnace application.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, manometer (recommended for verification). Disconnect the lead wires, remove the single mounting screw, swap the hose, reconnect leads, and restore power. Always run a full heat call to confirm operation.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Orders ship same business day from our warehouse when placed before cut-off.

Compatibility: Designed as a direct OEM replacement for the Carrier PY1PEA042080ACBA gas furnace. Always verify the W.C. rating and lead length against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — ships same day from stock.