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OEM Carrier Transformer 24V/40VA for Furnace Model GB1AAV024045ABJA
Carrier

OEM Carrier Transformer 24V/40VA for Furnace Model GB1AAV024045ABJA

SKU: carrier-transformer-gb1aav024045abja Brand: Carrier
$49.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Transformer 24V/40VA for Furnace Model GB1AAV024045ABJA

This genuine OEM Carrier transformer is the exact-fit replacement for your GB1AAV024045ABJA gas furnace. It converts incoming 120V line voltage down to the 24V low-voltage power that runs your thermostat, control board, gas valve, and safety circuit. A failed transformer leaves the furnace completely unresponsive: no thermostat display, no inducer, and no ignition sequence, which makes it a top suspect during a total no-heat condition. Manufactured to Carrier's factory specifications, this part ensures the correct VA output and mounting footprint so your control circuit receives stable, reliable power. Installation is a moderate task for those comfortable around line voltage; always shut off power at the breaker before transferring the primary and secondary leads. Most replacements are finished in under 30 minutes with basic hand tools. Installing the correct OEM transformer eliminates intermittent control-power faults and restores dependable furnace operation. In stock and ships same-day when you order before 3PM CST, getting your heat back fast.

Compatibility

This part is compatible with Carrier model GB1AAV024045ABJA.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

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 $75
  • 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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier Furnace Model GB1AAV024045ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier Furnace Model GB1AAV024045ABJA. 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 Furnace Model GB1AAV024045ABJA?
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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