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OEM Carrier Transformer 40VA 120V/24V for GB3AAV036070AFJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV036070AFJA

SKU: CARRIE-GB3AAV036070AFJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036070AFJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer for Model GB3AAV036070AFJA

This is the factory-original OEM control transformer (part number HT01BC116) designed as the exact replacement for the Carrier GB3AAV036070AFJA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that operates your thermostat, gas valve, inducer relay, and control board. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the furnace won't respond to any call for heat, and no LEDs illuminate on the control board. In many cases, a shorted downstream component causes the transformer to burn out; always check for low-voltage shorts before replacing.

  • Specs: 40VA rating | 120V primary / 24V secondary | Class 2 control transformer | OEM part number HT01BC116 | Factory-matched for full compatibility with GB3AAV036070AFJA control circuitry
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic units can overheat, trip thermal cutoffs, or deliver insufficient 24V current — causing intermittent lockouts or repeated burnout.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output and rule out downstream shorts). Label all wire connections before removal. Typical replacement time: 20–30 minutes.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier GB3AAV036070AFJA gas furnace. Verify existing transformer VA rating and primary/secondary voltages on your unit's data plate or wiring diagram before ordering. If your transformer failed due to a blown fuse or tripped breaker, inspect the 24V circuit for shorts prior to installation. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — reach out before you buy.

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 GB3AAV036070AFJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036070AFJA. 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 GB3AAV036070AFJA?
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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