What are the specs for this Transformer?

The correct replacement for Lennox model OEM Lennox Transformer — 55W96 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Lennox equipment which lists the model number OEM Lennox Transformer — 55W96.

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Lennox

OEM Lennox Transformer — 55W96

Name: OEM Lennox Transformer — 55W96
Brand: Lennox
SKU: LNX-55W96
Price: 29.95 USD
Availability: InStock

SKU: LNX-55W96 Brand: Lennox

$29.95 $39.95

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The Lennox 55W96 transformer is a genuine OEM component that steps down incoming line voltage to the low-voltage (typically 24V) power your thermostat, control board, and relays depend on. Every call for heating or cooling in your Lennox system relies on this transformer delivering clean, stable control power — without it, the entire low-voltage circuit goes dark.

Common failure symptoms: a completely unresponsive thermostat, no display or a blank screen, a system that won't start on any call, a repeatedly blown low-voltage fuse, or a faint buzzing followed by a burnt-electrical smell from the control area. A shorted or open transformer will stop the unit cold even when line power is present.

Why OEM matters: the 55W96 is engineered to match the exact VA rating, primary/secondary voltages, and mounting footprint Lennox specified for your equipment. Aftermarket substitutes with mismatched VA capacity can overload under demand or fail to power all connected accessories, leading to intermittent faults. Choosing the factory-correct Lennox part ensures proper fit, rated output, and reliable operation. In stock and ships same day.

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

OEM Lennox Transformer — 55W96

$29.95

Frequently Asked Questions

Does this Transformer fit my Lennox OEM Lennox Transformer — 55W96?

Yes. This is the factory-specified OEM transformer for the Lennox OEM Lennox Transformer — 55W96. 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 transformer on my Lennox OEM Lennox Transformer — 55W96?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Photo wiring connections. Step 3: Disconnect wires from old transformer. Step 4: Remove mounting hardware. Step 5: Install new transformer, reconnect wires matching voltage ratings. Step 6: Verify 24V output with multimeter.

My thermostat has no power. What failed?

Thermostat with no display = failed 24V transformer (or blown control board fuse). Check the 3A/5A fuse on the control board first ($1–$5 fix). If fuse is good but no 24V output from transformer, replace transformer.

Is this transformer 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 transformer?

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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OEM Lennox Transformer — 55W96

Shipping Information

Return Policy

Frequently Asked Questions