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Lennox

OEM Lennox 2-Wire Damper Actuator Wiring Harness — Y3449

SKU: LNX-Y3449 Brand: Lennox
$19.95 $29.95

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Texas CMBL #19328542014
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Govt POs Accepted

The genuine OEM Lennox Y3449 wiring harness provides the factory-rated electrical connection between your zoning control board and a 2-wire damper actuator (Honeywell MS8105A1030-type) used on Lennox zone dampers rated up to 10 sq ft. This harness carries the low-voltage signal that drives the actuator open and closed, allowing your Lennox comfort system to direct conditioned air to the zones calling for heating or cooling.

When a damper harness fails or corrodes, you'll often see a zone that won't open or close, dampers stuck in one position, erratic zone response, or a control board that reports a damper fault. Frayed, pinched, or heat-damaged wiring is a common culprit behind these zoning complaints.

Choosing the OEM Lennox Y3449 harness ensures the connector, pinout, and conductor gauge match your equipment exactly—no splicing, adapters, or guesswork. Generic substitutes risk poor connections and intermittent damper operation. Installing the correct factory part protects your zoning system's reliability and keeps every zone responding as designed.

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 Wiring Harness fit my Lennox OEM Lennox 2-Wire Damper Actuator Wiring Harness — Y3449?
Yes. This is the factory-specified OEM wiring harness for the Lennox OEM Lennox 2-Wire Damper Actuator Wiring Harness — Y3449. 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 wiring harness on my Lennox OEM Lennox 2-Wire Damper Actuator Wiring Harness — Y3449?
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 wiring harness?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this wiring harness 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 wiring harness?
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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