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OEM Carrier Furnace Transformer 40VA 120V-24V — U19X080UW36B
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V — U19X080UW36B

SKU: CARRIE-U19X080UW36B-TRANSFORMER-HT01CN001 Brand: Carrier
✓ Guaranteed to fit U19X080UW36B — or your money back. Terms

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OEM Carrier Furnace Transformer 40VA 120V to 24V/12V for Model U19X080UW36B

This is the factory OEM replacement transformer for the Carrier U19X080UW36B furnace. The transformer steps down 120V line voltage to a safe 24V/12V output to power the low-voltage control circuit — including your thermostat, ignition sequencing, and safety controls. When this transformer fails, the entire control circuit loses power: the thermostat goes blank, the system refuses to respond to any call for heat, and you may detect a faint buzzing or burning smell near the furnace control box. Replacing the transformer with the correct OEM part is one of the most reliable and cost-effective fixes available for a completely unresponsive furnace.

  • Specs: 120V Primary | 24V / 12V Secondary | 40VA Rating | OEM Part # HT01CN001 | Factory-matched output for Carrier U19X080UW36B control circuits
  • OEM vs Generic: This is a genuine Carrier OEM transformer built to exact factory VA rating and winding tolerances. Undersized or off-spec aftermarket transformers are a leading cause of nuisance tripped breakers, burned control boards, and shortened system life — don't risk it on a component this critical.
  • Install Difficulty: 3/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester, multimeter. Label and photograph all wiring connections before removal. If the replacement transformer blows immediately, inspect all 24V control wiring for short circuits before condemning the part.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct drop-in replacement for the Carrier U19X080UW36B furnace. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Cross-references include legacy Carrier part numbers HT01BJ115, 19EA41612, and 19EA42612. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today and get this part shipped the same business 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 $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 Transformer fit my Carrier OEM Carrier Furnace Transformer 40VA 120V-24V — U19X080UW36B?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 40VA 120V-24V — U19X080UW36B. 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 Carrier OEM Carrier Furnace Transformer 40VA 120V-24V — U19X080UW36B?
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 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 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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Mike Rivera
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