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Lennox

OEM Lennox LonTalk Network Control Kit — 54W27

SKU: LNX-54W27 Brand: Lennox
$39.95 $54.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 54W27 is a LonTalk control kit that enables your Lennox commercial HVAC equipment to communicate over a LonWorks (LonTalk) building automation network. This module translates unit operating data — setpoints, status, alarms, and commands — between the Lennox rooftop or air handling equipment and a central building management system, allowing coordinated, networked control of your facility's comfort systems.

Common failure symptoms include loss of communication between the unit and the building automation system, unresponsive network commands, dropped or intermittent data on the LON bus, alarm or fault codes not reporting to the front end, and the equipment reverting to standalone or local control. A failed control kit can leave the unit unable to receive remote setpoint or scheduling commands.

Why OEM matters: the Lennox 54W27 is engineered and factory-programmed for the specific network profile, addressing, and firmware handshake used by Lennox equipment. Installing the correct OEM kit ensures reliable LonTalk communication, proper point mapping to the building automation system, and full compatibility with the unit's onboard controller. Generic network modules typically will not integrate correctly with the Lennox communication protocol.

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 $75
  • 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 Lennox OEM Lennox LonTalk Network Control Kit — 54W27?
Yes. This is the factory-specified OEM control board for the Lennox OEM Lennox LonTalk Network Control Kit — 54W27. 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 Lennox OEM Lennox LonTalk Network Control Kit — 54W27?
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 Lennox 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 Lennox 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