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OEM Carrier Transformer 40VA 120V/24V for GB1AAV024045ADJA
Carrier

OEM Carrier Transformer 40VA 120V/24V for GB1AAV024045ADJA

SKU: CARRIE-GB1AAV024045ADJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit GB1AAV024045ADJA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model GB1AAV024045ADJA

This is the factory OEM replacement transformer (part# HT01BC116) for the Carrier GB1AAV024045ADJA fan coil unit. The transformer steps down 120V line voltage to 24V AC, which powers the entire low-voltage control circuit — including the thermostat, control board, and zone valves. When this transformer fails, the thermostat goes completely dark, the system stops responding to any call for heating or cooling, and in some cases a tripped secondary fuse is the first clue. No other component can bring the system back online until the transformer is replaced.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched output voltage and VA capacity for Carrier GB1AAV024045ADJA
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control circuit. Undersized or off-tolerance generic units can overheat, trip thermal cutoffs repeatedly, or deliver insufficient current to fire contactors and gas valves reliably.
  • Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, needle-nose pliers, multimeter to confirm 24V output after installation. Label all low-voltage wiring before disconnecting from the old transformer.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered specifically for the Carrier GB1AAV024045ADJA fan coil unit. Confirm your unit's data plate lists 120V primary input and 24V/40VA secondary before ordering. If you're unsure of fitment, our parts team is available to verify compatibility before you buy. Order today and receive same-day shipping — get your system back online fast.

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 GB1AAV024045ADJA?
Yes. This is the factory-specified OEM transformer for the Carrier GB1AAV024045ADJA. 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 GB1AAV024045ADJA?
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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