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OEM Carrier Control Transformer 40VA 120/24V for GB3AAV036050AEJA
Carrier

OEM Carrier Control Transformer 40VA 120/24V for GB3AAV036050AEJA

SKU: CARRIE-GB3AAV036050AEJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036050AEJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V/24V for Model GB3AAV036050AEJA

This OEM replacement control transformer (part# HT01BC116) is the factory-specified unit for the Carrier GB3AAV036050AEJA gas furnace. The transformer steps down 120V line voltage to the 24V signal required by the thermostat, control board, gas valve, and all low-voltage control circuit components. When the transformer fails, the entire control circuit goes dark — the thermostat display may go blank, the system won't respond to any call for heat or cooling, and you may measure zero voltage at the 24V secondary terminals. A shorted transformer will often trip or blow the control fuse repeatedly.

  • Specs: 40VA rated | 120V primary / 24V secondary | OEM part number HT01BC116 | Factory-matched output for Carrier GB3AAV036050AEJA control circuits
  • OEM vs Generic: This is the exact factory-supplied transformer. OEM units are wound and potted to Carrier's specifications, ensuring stable 24V output under full load. Generic transformers frequently underperform at rated VA, causing nuisance lockouts and erratic board behavior.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all wiring before removal. Replacement is straightforward — primary wires connect to line voltage, secondary wires feed the 24V control circuit.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered and factory-matched for the Carrier GB3AAV036050AEJA gas furnace. Verify your existing transformer's VA rating and primary/secondary voltage on the data plate before ordering. If you are unsure of fitment, our HVAC parts specialists will confirm compatibility before your order ships — same-day shipping on all in-stock parts ordered before 3PM local time.

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 GB3AAV036050AEJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036050AEJA. 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 GB3AAV036050AEJA?
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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