OEM Carrier Single-Pole Contactor 24V 25A — Carrier Model PY3PNA036090AA

This is the OEM factory-specified single-pole contactor for the Carrier PY3PNA036090AA condensing unit. The contactor is the primary high-voltage switching relay in your system: when the thermostat calls for cooling, the 24V control circuit energizes the contactor coil, closing the contacts and delivering line voltage to the compressor and condenser fan motor. When the contactor fails — through pitted or welded contacts, a burned coil, or worn contact surfaces — you'll typically find the outdoor unit will not energize at all, or in the case of welded contacts, may run continuously and refuse to shut off.

• Specs: 1-Pole | 24V AC Coil (50/60 Hz) | 25 FLA (Full Load Amps) | OEM Part Number: HN51KB024 | Definite purpose contactor
• OEM vs Generic: This is a genuine Carrier OEM contactor manufactured to factory tolerances. Generic aftermarket contactors often use lower-grade contact alloys that pit and weld faster under the repeated high-inrush loads of compressor cycling, shortening their service life significantly.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before disconnecting — note coil lead positions carefully, as low-voltage terminals vary by contactor design.
• Warranty & Shipping: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PY3PNA036090AA. Always verify the part number on your unit's wiring diagram or data label before ordering. Need help confirming fitment? Our HVAC parts team will verify compatibility before you buy — no guesswork required.