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OEM Carrier Contactor 2-Pole 24V Coil for HB1AJX036000AAAA
Carrier

OEM Carrier Contactor 2-Pole 24V Coil for HB1AJX036000AAAA

SKU: CARRIE-HB1AJX036000AAAA-CONTACTOR-HN51KB024 Brand: Carrier
✓ Guaranteed to fit HB1AJX036000AAAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Contactor 2-Pole 24V Coil for Model HB1AJX036000AAAA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier HB1AJX036000AAAA split-system condenser. The contactor acts as a high-voltage relay — when the thermostat calls for cooling, the 24V control circuit energizes the coil, closing the contacts and sending 240V power to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an air conditioner that simply won't turn on, hums without starting, or experiences intermittent cooling loss. Burned or pitted contact points are a telltale sign of contactor failure.

  • Specs: 2-pole design | 24V coil voltage | High-amperage contacts rated for compressor load | Direct OEM replacement — part number HN51KB024 | Factory-matched contact material and coil resistance
  • OEM vs Generic: This OEM contactor uses factory-spec contact alloy and coil windings. Generic contactors frequently feature substandard contact surfaces that pit and corrode faster, leading to premature failure and potential compressor damage. OEM is always the recommended replacement.
  • Install Difficulty: 3/5 — ALWAYS shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wire connections before removing the old contactor. Line-voltage terminals carry 240V — treat with extreme caution.
  • Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed as a direct drop-in replacement for the Carrier HB1AJX036000AAAA 3-ton split-system condenser. Verify your existing contactor's pole count and coil voltage against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — no guesswork, no returns.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $99
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Contactor fit my Carrier HB1AJX036000AAAA?
Yes. This is the factory-specified OEM contactor for the Carrier HB1AJX036000AAAA. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the contactor on my Carrier HB1AJX036000AAAA?
Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Open condensing unit panel. Step 3: Photograph ALL wiring on the contactor. Step 4: Label each wire with tape. Step 5: Disconnect wires and remove old contactor. Step 6: Mount new contactor, reconnect wires matching your photo. Step 7: Restore power and test.
My AC clicks but the compressor won’t turn on. What’s wrong?
Clicking from the outdoor unit without the compressor starting = worn contactor. The contactor sends power to the compressor. When its contacts are pitted, it clicks but can’t make solid contact. Look for: visible pitting/burn marks on the contactor face, intermittent operation, or buzzing.
Is this contactor compatible with Bryant or Payne too?
Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Carrier contactor?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
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