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OEM Carrier Transformer 40VA 120/24V for GB3AAV024035AAJA
Carrier

OEM Carrier Transformer 40VA 120/24V for GB3AAV024035AAJA

SKU: CARRIE-GB3AAV024035AAJA-TRANSFORMER-HT01BC116 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V/24V for Model GB3AAV024035AAJA

This is the factory OEM replacement transformer (part number HT01BC116) for the Carrier GB3AAV024035AAJA gas furnace. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and safety switches. When this component fails, the entire system goes dark: the thermostat shows no response, the control board is unresponsive, and absolutely nothing happens when a call for heat or cooling is made. A failed transformer is one of the most overlooked root causes of a completely unresponsive HVAC system.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BC116 | Factory wire leads for direct reconnection
  • OEM vs Generic: This OEM transformer is wound and rated to exact Carrier factory specifications. Generic transformers frequently use undersized VA ratings that overheat under normal control circuit loads, causing repeated failures and potential damage to downstream components like the control board.
  • Install Difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label or photograph existing wire connections before disconnecting the old transformer.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct OEM replacement for Carrier model GB3AAV024035AAJA. Always verify the transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping means you're back up and running 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 $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 GB3AAV024035AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV024035AAJA. 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 GB3AAV024035AAJA?
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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