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OEM Carrier Furnace Transformer 120V–24V 40VA — UPFLOW100U3619X
Carrier

OEM Carrier Furnace Transformer 120V–24V 40VA — UPFLOW100U3619X

SKU: CARRIE-UPFLOW100U3619X-TRANSFORMER-HT01CN001 Brand: Carrier
✓ Guaranteed to fit UPFLOW100U3619X — or your money back. Terms

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OEM Carrier Furnace Transformer 120V to 24V 40VA for Model UPFLOW100U3619X

This is the OEM factory-specified control transformer for the Carrier UPFLOW100U3619X upflow furnace. The transformer steps down 120V line voltage to a safe 24V (with a 12V tap) to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and ignition board. When this transformer fails, the entire control circuit goes dark: the thermostat loses power, the furnace will not respond to any call for heat, and no diagnostic codes will display. Electrical surges, shorted control wiring, and normal wear are the most common causes of failure.

  • Specs: 120V primary | 24V / 12V secondary | 40VA output | OEM part number HT01CN001 | Replaces legacy part numbers HT01BJ115, 19EA41612, 19EA42612
  • OEM vs Generic: OEM transformers are wound to exact Carrier factory tolerances, ensuring stable 24V output under full control-circuit load. Off-brand substitutes often produce voltage sag under load, causing erratic lockouts, nuisance trips, and premature board failures.
  • Install difficulty: 2/5 — Turn off power at the breaker and verify voltage is absent before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph existing wiring connections before disconnecting. Typically a 15–30 minute replacement for a qualified technician.
  • Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Designed as a direct OEM drop-in replacement for the Carrier UPFLOW100U3619X upflow gas furnace. Always verify your unit's data plate voltage and VA requirements before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions.

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 120V–24V 40VA — UPFLOW100U3619X?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 120V–24V 40VA — UPFLOW100U3619X. 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 120V–24V 40VA — UPFLOW100U3619X?
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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