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OEM Carrier Transformer 40VA 120V-24V for GB1AAV036111ABJA
Carrier

OEM Carrier Transformer 40VA 120V-24V for GB1AAV036111ABJA

SKU: CARRIE-GB1AAV036111ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB1AAV036111ABJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V to 24V for Model GB1AAV036111ABJA

This OEM replacement transformer (part# HT01BC116) is the factory-specified step-down transformer for the Carrier GB1AAV036111ABJA gas furnace. The transformer converts 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, control board, and zone controls. When this component fails, absolutely nothing in the control system responds: the thermostat goes blank, the furnace won't fire, and no fault codes appear because the board itself has no power. A failed transformer is often overlooked during diagnosis but is a quick, low-cost fix when confirmed with a multimeter.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement | Part number HT01BC116 | Matches factory wiring terminals
  • OEM vs Generic: This OEM unit is wound to exact VA and voltage tolerances required by the Carrier control board. Under-rated or off-tolerance generic transformers can overheat under load, trip internal thermal cutoffs, and cause intermittent control failures that are notoriously difficult to diagnose.
  • Install difficulty: 2/5 — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph existing wiring connections before removal. Primary wires connect to line voltage leads; secondary wires connect to 24V control terminals on the board.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered specifically for the Carrier GB1AAV036111ABJA gas furnace. Confirm your existing transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. Our parts specialists are available to verify fitment — don't guess on a control circuit component. Order now and ships 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 GB1AAV036111ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB1AAV036111ABJA. 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 GB1AAV036111ABJA?
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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