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OEM Carrier Transformer 40VA 120V/24V for GB3AAV024070AFJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV024070AFJA

SKU: CARRIE-GB3AAV024070AFJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV024070AFJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer for Model GB3AAV024070AFJA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier GB3AAV024070AFJA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, nothing in the system responds: the thermostat goes blank, the furnace won't fire, and there is zero 24V signal at the board. If you've confirmed a blown fuse or tripped breaker but still have no control voltage after reset, a failed transformer is the most likely culprit.

  • Specs: 40VA rated | 120V primary / 24V secondary | Class 2 control transformer | OEM part number HT01BC116 | Factory-matched output tolerance
  • OEM vs Generic: The OEM HT01BC116 is wound to Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat under load, trip the integrated fuse, or damage the control board — a far costlier repair down the road.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wires). Label all wire connections before removal. Replacement typically takes 15–20 minutes.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Designed for the Carrier GB3AAV024070AFJA gas furnace. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. If you're unsure about fitment, our parts team is ready to confirm compatibility before you buy — no guesswork required. Order today and get same-day shipping.

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 GB3AAV024070AFJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV024070AFJA. 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 GB3AAV024070AFJA?
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
HVAC Parts Specialist — Online