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Lennox

OEM Lennox Relay — 66463

SKU: LNX-66463 Brand: Lennox
$24.95 $34.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The Genuine OEM Lennox 66463 relay is an electrically operated switch that lets the low-voltage control circuit turn a higher-voltage load — such as the blower or an accessory circuit — on and off. When its coil energizes, the internal contacts close to route power where the control board commands, making it a key link between your thermostat signals and the components that actually move air in your Lennox system.

When a relay fails you may see a blower or fan that won't start or won't shut off, intermittent operation, a buzzing or clicking sound from the control area, or contacts that are pitted and burned. Because a stuck or dead relay interrupts normal cycling, it often mimics a control-board or motor problem, so verifying the relay is a smart first step.

Installing the OEM 66463 matters because it is built to the exact coil voltage and contact rating your Lennox equipment expects. A mismatched aftermarket relay can chatter, fail early, or fail to carry the load reliably. This factory-original part restores clean, dependable switching so your Lennox system cycles the way it was designed to.

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 Relay fit my Lennox OEM Lennox Relay — 66463?
Yes. This is the factory-specified OEM relay for the Lennox OEM Lennox Relay — 66463. 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 relay on my Lennox OEM Lennox Relay — 66463?
Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.
What symptoms mean I need a new relay?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this relay 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 relay?
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
HVAC Parts Specialist — Online