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OEM Carrier Transformer 40VA 120V-24V for GB1AAV036045ADJA
Carrier

OEM Carrier Transformer 40VA 120V-24V for GB1AAV036045ADJA

SKU: CARRIE-GB1AAV036045ADJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB1AAV036045ADJA — or your money back. Terms

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OEM Carrier 40VA Control Transformer for Model GB1AAV036045ADJA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier GB1AAV036045ADJA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal required to power the thermostat, control board, gas valve, and all other low-voltage components. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the system is completely unresponsive, and no heating or cooling operation is possible. A blown transformer is often caused by a wiring short downstream, so always inspect low-voltage wiring before replacing.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched output for Carrier low-voltage control circuits
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances specified by Carrier. Undersized or off-tolerance generic units can overheat, trip their internal fuse, or damage sensitive control boards and gas valves over time.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Label or photograph all wiring before disconnecting. Check for downstream shorts before energizing the new transformer.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GB1AAV036045ADJA gas furnace using OEM part number HT01BC116. Confirm your unit's transformer VA rating and voltage on the data plate before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get back to comfort fast.

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 GB1AAV036045ADJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB1AAV036045ADJA. 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 GB1AAV036045ADJA?
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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