OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GPAA36060AA

This OEM Carrier draft inducer pressure switch is the factory-specified replacement for the Carrier PY3GPAA36060AA gas furnace. The pressure switch monitors the negative pressure created by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails or sticks open, the control board cannot verify safe draft conditions, resulting in a hard lockout — the furnace attempts to start, the inducer spins, but the burners never ignite. This part carries OEM part number HK06WC061, now superseded by the current Carrier factory replacement HK06MB061, which ships as the direct drop-in equivalent.

• Specs: 0.18" W.C. (inches water column) open rating | Single-port draft proving switch | Normally open (N.O.) configuration | Factory-matched Honeywell IS20224-5236 internals
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances at the factory. Generic alternatives often drift ±15% from rated set-point, causing nuisance lockouts or — more dangerously — masking true venting failures.
• Install difficulty: 2/5 — Turn off power and gas before beginning. Disconnect the rubber pressure port tubing and two wire terminals. Swap the switch and reconnect. Tools needed: flat-head screwdriver, 1/4" nut driver, and a manometer or magnehelic gauge to verify draft pressure post-install.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PY3GPAA36060AA gas furnace. Note that OEM part number HK06WC061 has been superseded by HK06MB061 — both are functionally identical at 0.18" WC. Always verify the W.C. rating printed on your existing switch before ordering. Have questions about fitment? Our HVAC parts team confirms compatibility before you buy — order with confidence and get it shipped today.