OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY3GNA024060NA

This OEM draft inducer pressure switch is the factory-specified replacement for the Carrier PY3GNA024060NA packaged unit. The pressure switch monitors 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 that combustion gases are being safely exhausted — resulting in a hard lockout before the burners ever fire. Common symptoms include a furnace that attempts to start but shuts down immediately, error codes indicating a pressure switch fault, or an inducer motor that runs continuously with no ignition.

• Specs: 0.18" Water Column (WC) | SPST normally open | OEM part HK06WC061 (superseded by HK06MB061) | Honeywell-manufactured switch IS20224-5236
• OEM vs Generic: OEM switches are calibrated to exact factory set-point tolerances. Off-brand substitutes with loose WC tolerances can cause nuisance lockouts or, worse, allow ignition under unsafe venting conditions.
• Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer to verify inducer static pressure if nuisance lockouts persist. Photograph all hose and wiring connections before removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed for Carrier model PY3GNA024060NA packaged gas/electric units. This part number has been superseded — current shipping equivalent is HK06MB061, which is a direct OEM drop-in replacement. Verify the 0.18" WC rating on your existing switch before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.