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OEM Carrier Transformer 40VA 120V/24V for GB3AAV036050ABJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV036050ABJA

SKU: CARRIE-GB3AAV036050ABJA-TRANSFORMER-HT01BC116 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model GB3AAV036050ABJA

This OEM step-down transformer (part number HT01BC116) is the factory-specified replacement for the Carrier GB3AAV036050ABJA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuits. When the transformer fails, the entire control circuit loses power — the thermostat goes blank, the system will not respond to any calls for heat or cooling, and in many cases nothing in the unit appears to function at all.

  • Specs: Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01BC116 | Factory-matched windings and thermal protection
  • OEM vs Generic: OEM transformers are wound to factory VA ratings with integrated thermal overload protection, preventing burnout from control board shorts. Generic alternatives frequently underrate VA capacity, leading to premature failure and potential control board damage.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire nuts or quick-connect terminals, non-contact voltage tester. Photograph all wiring before removal. Confirm 24V output with a multimeter after installation before restoring full power.
  • Warranty: 1-year OEM factory warranty. In-stock units ship the same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GB3AAV036050ABJA gas furnace. Verify your existing transformer's input/output voltage and VA rating on the data plate or existing unit label before ordering. If you are unsure of fitment, our HVAC parts specialists can confirm compatibility before you purchase — reach out before placing your order.

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 GB3AAV036050ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036050ABJA. 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 GB3AAV036050ABJA?
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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