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OEM Carrier Transformer FA4BNF030008 for Model FA4BNF030008AAAA

SKU: carrier-transformer-fa4bnf030008aaaa Brand: Carrier
$74.95

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

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OEM Carrier Transformer FA4BNF030008 for Model FA4BNF030008AAAA

This OEM Carrier transformer steps down incoming line voltage to the 24V control voltage your FA4BNF030008AAAA fan coil needs to power its thermostat, control board, and contactor circuit. When your system has no power at the thermostat, blows low-voltage fuses, or fails to start, a failed transformer is a common culprit. This is a genuine Carrier replacement engineered to the exact VA rating and primary/secondary specs of your unit, ensuring stable control power and protecting downstream components. It is a direct-fit replacement for the FA4BNF030008AAAA, mounting in the original location with matching wire leads. Installation is moderate and best handled by an HVAC technician: disconnect power, label and transfer the primary and secondary leads, then mount and reconnect. Using the correct OEM part avoids the voltage mismatches and nuisance trips that aftermarket units can cause. In stock and ships same-day when ordered before 3PM CST, so you can get your fan coil back online fast. Backed by genuine Carrier quality for reliable, long-lasting control power.

Compatibility

This part is compatible with Carrier model FA4BNF030008AAAA.

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 Model FA4BNF030008AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4BNF030008AAAA. 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 Model FA4BNF030008AAAA?
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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