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 Transformer 40VA 120/24V for GB1AAV048135ACJA
Carrier

OEM Carrier Transformer 40VA 120/24V for GB1AAV048135ACJA

SKU: CARRIE-GB1AAV048135ACJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB1AAV048135ACJA — 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 Control Transformer 40VA 120V/24V for Model GB1AAV048135ACJA

This OEM replacement control transformer (part# HT01BC116) is the factory-specified unit for the Carrier GB1AAV048135ACJA gas furnace. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, gas valve, and all low-voltage control circuits. When it fails, nothing in the system responds — the thermostat goes dark, the furnace won't call for heat, and no error codes are generated because the board itself has no power. A blown fuse on the secondary side or a shorted control wire are common root causes; always diagnose before replacing.

  • Specs: 40VA rating | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01BC116 | Factory-matched output for stable low-voltage control circuit operation
  • OEM vs Generic: The OEM HT01BC116 transformer delivers a tightly regulated 24V output under load, protecting sensitive control boards and gas valves. Generic transformers can sag under full VA draw, causing intermittent lockouts and premature board failure.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Verify primary and secondary voltages with a meter after installation before restoring full system operation.
  • Warranty: 1-year OEM factory warranty included. In-stock units ship same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered for the Carrier GB1AAV048135ACJA gas furnace. Verify existing transformer VA rating and voltage markings on your unit's data plate before ordering to confirm fitment. The GB1AAV048135ACJA is a 4-ton, 135,000 BTU upflow/horizontal gas furnace — the 40VA transformer is standard for this configuration. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — just reach out via chat or phone.

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 GB1AAV048135ACJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB1AAV048135ACJA. 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 GB1AAV048135ACJA?
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