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OEM Carrier Transformer 40VA 120V/24V for GB3AAV024070ACJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV024070ACJA

SKU: CARRIE-GB3AAV024070ACJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV024070ACJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Circuit Transformer 40VA for Model GB3AAV024070ACJA

This OEM Carrier transformer (part number HT01BC116) is the factory-specified replacement for the GB3AAV024070ACJA gas furnace. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this component fails, absolutely nothing in the system responds: the thermostat goes blank, the furnace won't initiate a heating cycle, and there is no 24V signal anywhere in the control circuit. It is often one of the first parts to check when a furnace appears completely dead despite having power at the disconnect.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched output tolerance for reliable control circuit performance
  • OEM vs Generic: This factory OEM transformer meets Carrier's exact VA rating and insulation class requirements. Generic transformers may be undersized in VA capacity, causing voltage sag under load that leads to nuisance lockouts and premature control board failure.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Verify 24V output at secondary terminals after installation before restoring full power.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier GB3AAV024070ACJA gas furnace. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — 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 GB3AAV024070ACJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV024070ACJA. 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 GB3AAV024070ACJA?
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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