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OEM Carrier Transformer 40VA 120V/24V for GB3AAV036035AAJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB3AAV036035AAJA

SKU: CARRIE-GB3AAV036035AAJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036035AAJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer HT01BC116 for Model GB3AAV036035AAJA

This OEM control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier GB3AAV036035AAJA gas furnace. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, nothing in the system responds: the thermostat goes blank, the furnace won't fire, and you may find a blown fuse on the control board as a secondary symptom.

  • Specs: Input 120V AC | Output 24V AC | 40VA rating | Primary/secondary wire leads | Factory-matched impedance for stable low-voltage circuit operation
  • OEM vs Generic: This is a genuine OEM Carrier transformer built to exact factory VA and voltage tolerances. Generic transformers may deliver inconsistent 24V output, causing nuisance lockouts, erratic ignition sequencing, or premature control board failure — making the OEM choice the safer long-term investment.
  • Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire nuts or terminal connectors, multimeter. Photograph existing wiring before disconnecting. Installation typically takes 20–30 minutes.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier GB3AAV036035AAJA gas furnace. Verify your existing transformer's input/output voltage and VA rating against your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm 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 GB3AAV036035AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036035AAJA. 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 GB3AAV036035AAJA?
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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