OEM Carrier Draft Pressure Switch 0.18" WC for Model PY4GNAB60115NA

This is the genuine OEM factory-specified draft inducer pressure switch for the Carrier PY4GNAB60115NA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm safe venting conditions before allowing ignition. When it fails or becomes stuck open, the control board cannot prove inducer operation, resulting in a no-heat lockout — often with a fault code indicating a pressure switch fault. Common failure causes include a cracked hose, blocked condensate trap, or a diaphragm that has lost its ability to close at the rated 0.18" W.C. setpoint.

• Specs: 0.18" W.C. (water column) setpoint | Normally open | Honeywell-manufactured (IS20224-5236) | Direct OEM replacement for Carrier part number HK06WC061 (superseded by HK06MB061)
• OEM vs Generic: This genuine Carrier/Honeywell pressure switch is calibrated to the exact 0.18" W.C. factory setpoint. Aftermarket substitutes frequently drift out of tolerance, causing nuisance lockouts or — more dangerously — failing to detect a true venting fault.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, and a manometer if verifying inducer draft. Label all hose and wiring connections before removing the old switch. Check the rubber hose for cracks or blockage before installing the new switch.
• Warranty & Shipping: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY4GNAB60115NA packaged unit. Also fits select Bryant and Payne models with the same 0.18" W.C. pressure switch specification. Note: OEM part number HK06WC061 has been superseded — this listing ships the current authorized replacement. Always verify the W.C. rating on your existing switch before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.