OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAA36060AA

This OEM pressure switch is the factory-specified replacement for the Carrier PY4GNAA36060AA packaged unit. The pressure switch proves that the inducer motor has created adequate negative pressure in the flue before allowing the ignition sequence to proceed. When this switch fails or sticks open, the control board interprets a blocked or unsafe flue condition and locks out the system — leaving you with no heat and often a diagnostic fault code. Common symptoms include the furnace or packaged unit cycling the inducer but never advancing to ignition, or an immediate lockout on every call for heat.

• Specs: 0.18" W.C. (inches water column) setpoint | Single-pole, normally open | Honeywell-manufactured (OEM reference IS20224-5236) | Replaces HK06WC061 and updated supersession HK06MB061
• OEM vs Generic: This is the genuine OEM-spec switch built to exact Carrier factory tolerances. Generic switches can drift outside the rated W.C. setpoint, causing nuisance lockouts or — more dangerously — allowing ignition under unsafe draft conditions.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer to verify draft pressure if nuisance trips continue after replacement. Always inspect the rubber hose fitting and port for blockages before condemning the switch.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PY4GNAA36060AA packaged unit. Also cross-references to Bryant and Payne models sharing the same draft pressure requirement. Verify the 0.18" W.C. rating on your existing switch or unit data plate before ordering. Our fitment team is available to confirm compatibility — just reach out before you buy. Order now and ship today!