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OEM Carrier Defrost Control Board HK32EA007 for PH3ZNB024000AA
Carrier

OEM Carrier Defrost Control Board HK32EA007 for PH3ZNB024000AA

SKU: CARRIE-PH3ZNB024000AA-CONTROL_BOARD-HK32EA007 Brand: Carrier
✓ Guaranteed to fit PH3ZNB024000AA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Defrost Control Board HK32EA007 for Model PH3ZNB024000AA

This is the genuine OEM Carrier defrost control board (part number HK32EA007), factory-specified for the Carrier PH3ZNB024000AA heat pump system. The defrost control board governs the automatic defrost cycle, monitoring outdoor coil temperature and initiating timed defrost sequences to prevent ice accumulation on the evaporator coil. When this board fails, common symptoms include the heat pump getting locked out in defrost mode, failing to switch between heating and cooling, or the outdoor unit icing over completely due to a missed or runaway defrost cycle — leaving your home without heat during the coldest days.

  • Specs: OEM Part # HK32EA007 | Cross-references: 1173636, 1177927 | Designed for Carrier / Bryant / Payne heat pump split systems | 24V control circuit compatible
  • OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket substitute. OEM boards use factory-programmed defrost timing logic and tested relay contacts, reducing the risk of nuisance lockouts or premature coil icing that is common with off-brand replacements.
  • Install difficulty: 3/5 — Requires shutting down the heat pump and discharging control voltage before board removal. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, a phone or camera to photograph all wiring harness connections prior to disconnecting. Verify thermostat wiring matches board terminal labeling before powering back up.
  • Warranty: 1-year OEM manufacturer warranty. Ships same business day from our in-stock warehouse inventory.

Compatibility: Direct OEM replacement for Carrier PH3ZNB024000AA heat pump systems. Also cross-references Carrier/Bryant/Payne units using OEM numbers 1173636 and 1177927 — always confirm your existing board part number against your unit's data plate before ordering. Our team is available to verify fitment before you buy.

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 Control Board fit my Carrier PH3ZNB024000AA?
Yes. This is the factory-specified OEM control board for the Carrier PH3ZNB024000AA. 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 control board on my Carrier PH3ZNB024000AA?
Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.
My HVAC system is completely dead. What could be wrong?
Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.
Is this control board 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 control board?
OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.
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
HVAC Parts Specialist — Online