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OEM Carrier Transformer 40VA 120/240V-24V for GB3AAV036070AEJA
Carrier

OEM Carrier Transformer 40VA 120/240V-24V for GB3AAV036070AEJA

SKU: CARRIE-GB3AAV036070AEJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036070AEJA — or your money back. Terms

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OEM Carrier Control Transformer 40VA for Model GB3AAV036070AEJA

This is the OEM factory-specified control transformer (part number HT01BC116) for the Carrier GB3AAV036070AEJA gas furnace. The transformer steps down line voltage (120V or 240V) to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heat or cooling, and the furnace will not ignite. It is one of the most commonly overlooked failure points in a no-power diagnostic.

  • Specs: 40VA rating | Primary: 120/240V | Secondary: 24V AC | Direct OEM replacement for Carrier part HT01BC116 | Factory wire leads for plug-and-play installation
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control board. Undersized or off-tolerance generic units can cause nuisance tripping of the 3-amp control fuse, erratic thermostat behavior, or premature board failure — costing far more than the savings.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Confirm primary voltage on your unit's data plate before connecting. Photograph all wiring before disconnecting the old transformer.
  • Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier GB3AAV036070AEJA gas furnace. Always verify your existing transformer's VA rating and primary voltage on the data plate before ordering to ensure correct fitment. Our parts specialists are available to confirm compatibility before you purchase — no guesswork required.

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 GB3AAV036070AEJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036070AEJA. 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 GB3AAV036070AEJA?
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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