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OEM Carrier 40VA Transformer 24V Control Circuit for GB3AAV036095AFJA
Carrier

OEM Carrier 40VA Transformer 24V Control Circuit for GB3AAV036095AFJA

SKU: CARRIE-GB3AAV036095AFJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036095AFJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Transformer 24V Control Circuit for Model GB3AAV036095AFJA

This OEM step-down transformer (part# HT01BC116) is the factory-specified replacement for the Carrier GB3AAV036095AFJA gas furnace. The transformer converts 120V line voltage down to 24V to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and safety switches. When it fails, the thermostat goes blank, the furnace will not respond to any call for heat, and nothing in the control circuit activates. A failed transformer is often misdiagnosed as a bad control board, so always test the transformer output first with a multimeter before replacing more expensive components.

  • Specs: 40VA rating | 120V primary input | 24V secondary output | Factory OEM part number HT01BC116 | Direct plug-in or wire-in mount
  • OEM vs Generic: This OEM transformer is wound and tested to Carrier's exact VA and voltage tolerances. Undersized or off-tolerance generic transformers can sag under load, causing intermittent lockouts, nuisance tripping of control boards, and premature component failure throughout the low-voltage circuit.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output at secondary terminals after installation before restoring full power.
  • Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier GB3AAV036095AFJA gas furnace. Verify your unit's existing transformer VA rating and primary/secondary voltages on the data plate or wiring diagram before ordering. If you have any questions about fitment, our HVAC parts specialists verify compatibility before you buy — no guesswork required.

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 GB3AAV036095AFJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036095AFJA. 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 GB3AAV036095AFJA?
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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