OEM Carrier Contactor 1-Pole 25A 24V Coil — Model PY3PNA036090AB (HN51KB024)

This is the factory OEM replacement contactor for the Carrier PY3PNA036090AB split-system heat pump and air conditioning unit. The contactor is the high-voltage relay that receives the 24V signal from your thermostat and closes the circuit to power the compressor and condenser fan. When the contactor fails — whether from pitted contacts, welded poles, or a burned coil — the outdoor unit simply won't start, leaving you with warm air and a spinning indoor blower but no cooling or heating output.

• Specs: 1-Pole | 25A FLA (Full Load Amps) | 24V 50/60Hz Coil | OEM Part# HN51KB024 | Direct drop-in replacement — no modifications required
• OEM vs Generic: OEM contactors are manufactured to Carrier's exact contact gap, coil pull-in voltage, and silver-alloy contact specification. Generic contactors often use lower-grade contact materials that arc and pit faster, especially under the high cycling loads of a heat pump application.
• Install Difficulty: 2/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Photograph all wiring before removing the old contactor. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. The contactor snaps or screws directly into the existing mounting position.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3PNA036090AB packaged heat pump unit. Verify your unit's data plate lists a 1-pole, 25A FLA contactor before ordering. Cross-reference OEM part number HN51KB024 to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you order — contact us anytime.