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OEM Carrier Transformer 40VA 120V/24V for GB3AAV036050AGJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV036050AGJA

SKU: CARRIE-GB3AAV036050AGJA-TRANSFORMER-HT01BC116 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Circuit Transformer 40VA for Model GB3AAV036050AGJA

This is the factory OEM replacement transformer (part number HT01BC116) for the Carrier GB3AAV036050AGJA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the control board, thermostat circuit, and all low-voltage switching components. When this transformer fails, the entire control circuit goes dead — the thermostat displays nothing, the furnace won't respond to any call for heat, and no fault codes will appear because the board itself has no power.

  • Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | Output: 40VA | OEM part number: HT01BC116 | Factory-matched wire leads and mounting footprint
  • OEM vs Generic: OEM transformers are wound to exact VA and impedance specifications for the Carrier GB3AAV036050AGJA control board. Undersized or off-spec generic units can overheat under load, trip the thermal cutoff, or deliver unstable 24V that causes erratic contactor and gas valve behavior.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connects. Photograph or label all low-voltage wiring before removal. Verify 24V output at secondary leads with a multimeter after installation before restoring full power.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier GB3AAV036050AGJA furnace. Always confirm the transformer's primary/secondary voltage and VA rating on your unit's wiring diagram or data plate before ordering. If your system has added accessories such as a humidifier or UV light drawing additional VA load, verify total circuit draw does not exceed 40VA. Our fitment team is available to confirm compatibility before you order — same-day shipping on all in-stock OEM parts.

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 GB3AAV036050AGJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036050AGJA. 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 GB3AAV036050AGJA?
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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