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OEM Carrier Transformer 40VA 120V/24V for GA1AAD036085AAJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GA1AAD036085AAJA

SKU: CARRIE-GA1AAD036085AAJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GA1AAD036085AAJA — or your money back. Terms

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OEM Carrier Transformer 40VA 120V/24V for Model GA1AAD036085AAJA

This OEM replacement transformer (part number HT01BC116) is the factory-specified control circuit transformer for the Carrier GA1AAD036085AAJA packaged unit. The transformer steps line voltage down from 120V to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, the entire control circuit goes dark — your thermostat will display nothing, the system won't respond to calls for heating or cooling, and you may find a blown fuse on the control board as a secondary symptom.

  • Specs: Input 120VAC | Output 24VAC | 40VA rating | OEM part number HT01BC116 | Factory wire lead configuration for direct replacement
  • OEM vs Generic: This OEM unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full VA load. Generic transformers frequently run low-voltage under load, causing intermittent lockouts, nuisance tripping, and premature contactor coil failure.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all low-voltage wiring before disconnecting. Always replace the fuse if one was found blown during diagnosis.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier GA1AAD036085AAJA packaged unit. Verify your existing transformer's input/output voltage and VA rating on the unit's data plate or transformer label before ordering. Our parts specialists are available to confirm fitment — contact us before you order 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 GA1AAD036085AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier GA1AAD036085AAJA. 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 GA1AAD036085AAJA?
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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