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OEM Carrier Transformer 40VA 120V-24V for GB3AAV036070ACJA
Carrier

OEM Carrier Transformer 40VA 120V-24V for GB3AAV036070ACJA

SKU: CARRIE-GB3AAV036070ACJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036070ACJA — 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 GB3AAV036070ACJA

This is the OEM factory-replacement control transformer (part number HT01BC116) for the Carrier GB3AAV036070ACJA gas furnace. The transformer steps down line voltage from 120V AC to 24V AC, powering the low-voltage control circuit that drives your thermostat, gas valve, inducer relay, and control board. When the transformer fails, the entire control circuit goes dead — the thermostat loses power, nothing responds to a call for heat or cooling, and the system will not operate at all. A failed transformer is one of the most commonly misdiagnosed furnace problems, often confused with a bad thermostat or control board.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01BC116 | Matches original wiring harness footprint for direct drop-in installation
  • OEM vs Generic: This is the genuine Carrier OEM transformer — wound to exact VA and voltage specifications. Generic transformers frequently run under-rated VA, causing nuisance tripping of the built-in thermal fuse and premature failure under normal HVAC load.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify voltage is off before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph existing wiring connections before removing the old unit. Primary and secondary terminals are clearly labeled for straightforward reconnection.
  • Warranty: 1-year OEM factory warranty against defects. Orders received before cutoff ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier GB3AAV036070ACJA gas furnace. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions. In stock and ready to ship 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 $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 GB3AAV036070ACJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036070ACJA. 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 GB3AAV036070ACJA?
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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