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OEM Carrier Transformer 40VA 120V–24V for KCABA01015TG
Carrier

OEM Carrier Transformer 40VA 120V–24V for KCABA01015TG

SKU: CARRIE-KCABA01015TG-TRANSFORMER-HT01BC116 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V–24V for Model KCABA01015TG

This OEM replacement transformer (part number HT01BC116) is the factory-specified control circuit transformer for the Carrier KCABA01015TG. The transformer steps down 120V line voltage to 24V AC, powering the thermostat, control board, contactor coil, and all low-voltage control wiring throughout the system. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any calls for heating or cooling, and you may find a tripped fuse on the control board. A failed transformer is one of the most common causes of a completely unresponsive HVAC system.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched wire lead configuration for direct plug-in installation
  • OEM vs Generic: This OEM transformer is wound to Carrier's exact VA rating and insulation class. Undersized or off-tolerance generic transformers can overheat, blow the low-voltage fuse repeatedly, or damage sensitive control boards — costing far more than the transformer itself.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 24V output after install), wire nuts or spade connectors. Photograph existing wiring before disconnecting leads.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier KCABA01015TG air handler/fan coil unit. Always verify your existing transformer's VA rating, primary voltage, and secondary voltage on the unit data plate before ordering. If you have any questions about fitment, our HVAC parts specialists confirm compatibility before your order ships — contact us today.

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 Transformer fit my Carrier KCABA01015TG?
Yes. This is the factory-specified OEM transformer for the Carrier KCABA01015TG. 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 KCABA01015TG?
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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