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OEM Carrier Transformer 40VA 120V/24V for GB3AAV024070AEJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV024070AEJA

SKU: CARRIE-GB3AAV024070AEJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV024070AEJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Transformer 40VA 120V to 24V for Model GB3AAV024070AEJA

This is the factory-specified OEM replacement transformer (part number HT01BC116) for the Carrier GB3AAV024070AEJA gas furnace. The transformer steps down line voltage from 120V to the 24V AC required to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and contactors. When this transformer fails, absolutely nothing in the control system responds: the thermostat goes dark, the furnace won't call for heat, and the system appears completely dead despite having power.

  • Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BC116 | Direct drop-in replacement with matching mounting footprint and terminal configuration
  • OEM vs Generic: This OEM transformer is wound to Carrier's exact VA and voltage tolerances. Undersized or off-spec generic transformers can sag under load, causing nuisance lockouts, erratic thermostat behavior, and premature control board failure — making OEM the only reliable long-term choice.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Verify 120V primary and 24V secondary output with a multimeter after installation before reassembling the furnace cabinet.
  • Warranty: 1-year OEM factory warranty. Orders ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier GB3AAV024070AEJA gas furnace. Confirm existing transformer's VA rating and primary/secondary voltages on your unit's data plate before ordering to ensure a proper match. Have questions about fitment? Our HVAC parts specialists verify compatibility before your order ships.

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 GB3AAV024070AEJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV024070AEJA. 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 GB3AAV024070AEJA?
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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