OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAA60115AA

This is the factory-specified OEM replacement pressure switch (part number HK06WC061) for the Carrier PY4GNAA60115AA packaged gas unit. The pressure switch is a critical safety component that monitors negative pressure created by the draft inducer motor. It proves that the inducer is operating correctly and that the flue path is clear before allowing the ignition sequence to proceed. When this switch fails, the furnace will lock out prior to ignition — leaving you with no heat. Common symptoms include an inducer motor that runs but the furnace never lights, a blinking fault code indicating a pressure switch fault, or a unit that continuously cycles without ever reaching the ignition stage.

• Specs: 0.18" W.C. (water column) set point | Single-port, normally open | Honeywell OEM cross-reference IS20224-5236 / 1938D2/B | Factory-matched trip pressure tolerance
• OEM vs Generic: This OEM switch is manufactured to exact Carrier factory specifications, ensuring precise trip-point calibration. Generic substitutes often carry wider pressure tolerances that can cause nuisance lockouts or, worse, allow unsafe inducer conditions to go undetected.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, flat-blade screwdriver, and a manometer or U-tube for verification. Remove the hose barb tubing from the old switch, unplug the wiring harness, unscrew the mounting bracket, and reverse to install. Always check for cracked hoses or blocked ports while the panel is open.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse — get your system back online fast.

Compatibility: Engineered for the Carrier PY4GNAA60115AA packaged gas/electric unit. Note: HK06WC061 has been superseded by HK06MB061 — both part numbers are fulfilled with the current production version. Verify the 0.18" W.C. rating on your existing switch before ordering. Not sure if this fits? Our HVAC parts specialists verify fitment before every order — call or chat today. In stock and ships today.