Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier 40VA Transformer 120V-24V HT01BC116 for GB3AAV036070ADJA
Carrier

OEM Carrier 40VA Transformer 120V-24V HT01BC116 for GB3AAV036070ADJA

SKU: CARRIE-GB3AAV036070ADJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB3AAV036070ADJA — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BC116 for Model GB3AAV036070ADJA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier GB3AAV036070ADJA gas furnace. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, contactor coils, and control board. When this component fails, the entire control circuit goes dead: the thermostat shows no power, no heating or cooling calls are processed, and the system will not respond in any mode. It is often the first component to check when a system appears completely unresponsive despite confirmed line voltage at the unit.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM Part# HT01BC116 | Factory-matched output tolerance for stable low-voltage operation
  • OEM vs Generic: This OEM transformer is wound and rated to Carrier's exact factory specifications. Generic transformers may carry inconsistent VA ratings or looser voltage tolerances, which can cause nuisance tripping, control board brownouts, or premature failure of downstream 24V components.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 0V at the primary terminals before handling. Photograph all wiring connections prior to removal.
  • Warranty: 1-year OEM factory warranty against defects. Orders received by 3PM local time ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier GB3AAV036070ADJA gas furnace. Confirm primary voltage (120V) and VA rating (40VA) on your unit's data plate or existing transformer label before ordering. If you are unsure of fitment, our HVAC parts specialists will verify compatibility before your order is placed — 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 GB3AAV036070ADJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB3AAV036070ADJA. 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 GB3AAV036070ADJA?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online