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OEM Carrier Transformer 40VA 120V/24V for GB3AAV048095AGJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV048095AGJA

SKU: CARRIE-GB3AAV048095AGJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV048095AGJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Transformer 40VA 120V/24V for Model GB3AAV048095AGJA

This OEM step-down transformer (part number HT01BC116) is the factory-specified replacement for the Carrier GB3AAV048095AGJA gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers your entire control circuit — including the thermostat, control board, contactor coils, and gas valve. When the transformer fails, nothing in the system responds: the thermostat goes blank, the furnace won't fire, and diagnostic LEDs on the control board may not illuminate at all. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before installing a replacement.

  • Specs: 40VA rating | 120V primary / 24V secondary | Class 2 output | OEM part number HT01BC116 | Factory-matched output tolerances for reliable control circuit performance
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact specifications, ensuring stable 24V output under full load. Generic units may sag under peak demand, causing erratic board behavior, nuisance lockouts, or premature failure of downstream components.
  • Install difficulty: 2/5 — Turn off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter (to confirm input/output voltage and rule out a downstream short). Always verify the 24V circuit is free of shorts before energizing the new transformer.
  • Warranty: 1-year OEM factory warranty. Orders received by 3 PM local time ship same business day from our stocked warehouse.

Compatibility: Engineered and tested for the Carrier GB3AAV048095AGJA gas furnace. Verify the OEM part number HT01BC116 and 40VA / 120V–24V rating against your unit's data plate and existing transformer before ordering. Our parts specialists are available to confirm fitment — contact us before you buy if you have any questions.

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 GB3AAV048095AGJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV048095AGJA. 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 GB3AAV048095AGJA?
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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