OEM Carrier Draft Pressure Switch 0.18" WC for Model PY4GEAB42060NA

This OEM draft-proving pressure switch is the factory-specified replacement for the Carrier PY4GEAB42060NA packaged unit. The pressure switch monitors negative pressure generated by the inducer motor to confirm safe venting before allowing ignition to proceed. When it fails or sticks open, the control board cannot verify that combustion gases are being safely exhausted — resulting in a no-heat lockout condition that occurs before the igniter even fires. A faulty pressure switch is one of the most common causes of furnace and packaged-unit lockout codes.

• Specs: 0.18" Water Column (WC) setpoint | SPST (Single-Pole, Single-Throw) | Normally Open | Factory OEM part number HK06WC061, updated successor HK06MB061 | Honeywell-manufactured (cross-ref IS20224-5236)
• OEM vs Generic: OEM pressure switches are calibrated to exact WC tolerances at the factory. Generic aftermarket switches frequently drift beyond ±0.02" WC, causing nuisance lockouts or, worse, allowing ignition under unsafe draft conditions. Always use OEM for life-safety components.
• Install difficulty: 2/5 — Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer (optional, for verification). Disconnect power before servicing. Remove the single hose port connection and two wire spade terminals, swap the switch, reconnect, and test inducer draft. No soldering required.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY4GEAB42060NA packaged unit. Also cross-references Bryant and Payne models sharing the same 0.18" WC draft switch specification. Verify the WC rating on your existing switch's label before ordering. Not sure it fits? Our HVAC parts team confirms fitment before you buy — order now and receive it fast with same-day shipping.