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OEM Carrier Transformer 40VA 24V for GB3AAV036070AGJA — HT01BC116
Carrier

OEM Carrier Transformer 40VA 24V for GB3AAV036070AGJA — HT01BC116

SKU: CARRIE-GB3AAV036070AGJA-TRANSFORMER-HT01BC116 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA for Model GB3AAV036070AGJA (HT01BC116)

This OEM control transformer is the factory-specified replacement for the Carrier GB3AAV036070AGJA gas furnace. The transformer steps down line voltage (120V) to the 24V AC signal required to power the thermostat, control board, gas valve, and all low-voltage control components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system shows no response, and nothing operates. It is one of the first components to check when a furnace appears completely unresponsive.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V AC | OEM Part Number HT01BC116 | Factory-matched output tolerance for reliable low-voltage control
  • OEM vs Generic: This OEM transformer delivers factory-correct 24V output under full load. Generic transformers often run under-rated VA, causing voltage sag that triggers nuisance lockouts, board faults, and premature contactor wear throughout the control circuit.
  • Install Difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wire connections before removing the old transformer. Verify primary and secondary terminals match your wiring before energizing.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered and factory-matched for the Carrier GB3AAV036070AGJA gas furnace. Always verify the 40VA rating and 120V/24V input-output specification on your unit's data plate before ordering. Our team is available to confirm fitment — order with confidence and get your system back online 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 GB3AAV036070AGJA — HT01BC116?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036070AGJA — HT01BC116. 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 GB3AAV036070AGJA — HT01BC116?
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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