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OEM Carrier Transformer 40VA 120V-24V for GB3AAV024055AAJA
Carrier

OEM Carrier Transformer 40VA 120V-24V for GB3AAV024055AAJA

SKU: CARRIE-GB3AAV024055AAJA-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 GB3AAV024055AAJA

This OEM replacement transformer (part number HT01BC116) is the factory-specified control circuit transformer for the Carrier GB3AAV024055AAJA gas furnace. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, control board, gas valve, and all low-voltage control components. When this transformer fails, the entire control circuit goes dark — your thermostat loses power, the furnace won't respond to any call for heat, and nothing works. It is often the first component to check when a furnace is completely unresponsive with no error codes.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM part number HT01BC116 | Direct plug-in or screw-terminal mount
  • OEM vs Generic: OEM transformers are wound to exact factory VA ratings, ensuring stable 24V output under full control-circuit load. Undersized generic units can sag below 24V, causing intermittent lockouts, nuisance tripping, and premature control board failure.
  • Install difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace plug before beginning. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter to verify 24V output after installation. Label or photograph all low-voltage wiring connections before removal.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed and factory-matched for the Carrier GB3AAV024055AAJA gas furnace. Verify your existing transformer's VA rating and wire lead configuration against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility before you purchase — same-day shipping means you're back up and running 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 $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 GB3AAV024055AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV024055AAJA. 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 GB3AAV024055AAJA?
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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