OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GEAA48115AA

This OEM Carrier pressure switch (part number HK06WC061, superseded by HK06MB061) is the factory-specified replacement for the Carrier PY3GEAA48115AA packaged unit. The pressure switch monitors negative pressure created by the inducer motor to confirm proper venting before the gas valve is allowed to open. When it fails or sticks open, the control board cannot verify that the inducer is running, causing the system to lock out before any ignition attempt — leaving you with no heat.

• Specs: 0.18" Water Column (WC) set point | Normally open (N/O) | Proven draft-proving design | Honeywell-manufactured (OEM cross-reference IS20224-5236) | Factory-matched switching tolerance
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. set points at the factory. Generic equivalents often carry wider tolerances that can cause nuisance lockouts or, worse, fail to detect a true blocked-flue condition — a safety risk. Always match the W.C. rating stamped on your existing switch.
• Install difficulty: 2/5 — Power down the unit at the disconnect before servicing. Tools needed: 1/4" nut driver or 5/16" wrench, needle-nose pliers, manometer (optional, for verification). Note the hose port orientation and photograph tubing routing before disconnecting. Reconnect the rubber hose firmly to prevent false trips.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered by 3:00 PM local time.

Compatibility: Designed for the Carrier PY3GEAA48115AA packaged unit. Note: HK06WC061 has been factory-superseded by HK06MB061 — both part numbers are fulfilled with the current production replacement. Also fits select Bryant and Payne models sharing the 0.18" WC specification. Verify the W.C. rating on your unit's existing switch before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.