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OEM Carrier Transformer 40VA 120V/24V for GB3AAV036070ABJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV036070ABJA

SKU: CARRIE-GB3AAV036070ABJA-TRANSFORMER-HT01BC116 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 40VA 120V–24V for Model GB3AAV036070ABJA

This is the factory OEM replacement transformer (part number HT01BC116) for the Carrier GB3AAV036070ABJA gas furnace. The transformer steps down line voltage (120V) to the 24V AC signal used by your thermostat, control board, and all low-voltage control circuits. When this part fails, the entire control circuit goes dark — your thermostat will show no power, the furnace will not respond to any calls for heat, and no error codes will display because the board itself has no power to run diagnostics.

  • Specs: 40VA rating | 120V primary / 24V secondary | Factory-matched OEM replacement | Part number HT01BC116 | Terminal connection style matches original harness
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA tolerance, protecting sensitive control boards from voltage spikes. Generic transformers may under-deliver on VA output, causing nuisance lockouts and premature board failure.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter for output verification. Label or photograph all wire connections before removing the original transformer. Confirm 24V output at secondary terminals before restoring full power.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GB3AAV036070ABJA gas furnace. Always verify primary voltage, secondary voltage, and VA rating on your unit's data plate or wiring diagram before ordering. Our fitment specialists are available to confirm compatibility before you purchase — reach out anytime. Order today and your part ships same business day.

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 GB3AAV036070ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036070ABJA. 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 GB3AAV036070ABJA?
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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