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OEM Carrier Furnace Transformer 120V–24V 40VA for U19X080UW36A
Carrier

OEM Carrier Furnace Transformer 120V–24V 40VA for U19X080UW36A

SKU: CARRIE-U19X080UW36A-TRANSFORMER-HT01CN001 Brand: Carrier
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OEM Carrier Furnace Transformer 120V to 24V 40VA — HT01CN001 for Model U19X080UW36A

This is the factory OEM replacement control transformer for the Carrier U19X080UW36A furnace. The transformer steps down 120V line voltage to a safe 24V (with 12V tap) for the low-voltage control circuit, powering your thermostat, control board, and all system relays. When it fails — due to a wiring short, electrical surge, or normal wear — the entire control circuit goes dark: the thermostat goes dead, the system won't respond to any commands, and no heating cycle can be initiated.

  • Specs: 120V primary input | 24V / 12V secondary output | 40VA power rating | Factory-matched OEM part number HT01CN001 | Replaces legacy part numbers HT01BJ115, 19EA41612, 19EA42612
  • OEM vs Generic: This is a genuine Carrier factory-authorized part, built to exact VA rating and winding tolerances. Generic transformers often run at reduced VA capacity, causing overheating, nuisance tripping of the secondary fuse, and premature control board failure.
  • Install difficulty: 3/5 — Shut off all power at the breaker and disconnect the 120V supply before touching any wiring. Label all low-voltage wires before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Recommend inspecting all low-voltage wiring for shorts before energizing the new transformer.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the exact OEM replacement for Carrier model U19X080UW36A. Verify your existing transformer's primary voltage (120V), secondary voltage (24V/12V), and VA rating (40VA) against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists are available to verify compatibility before you buy — order with confidence and get back to comfort fast.

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 U19X080UW36A?
Yes. This is the factory-specified OEM transformer for the Carrier U19X080UW36A. 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 U19X080UW36A?
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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