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OEM Carrier Transformer 40VA for Model FV4BNB003T00AAAA Fan Coil
Carrier

OEM Carrier Transformer 40VA for Model FV4BNB003T00AAAA Fan Coil

SKU: carrier-transformer-fv4bnb003t00aaaa Brand: Carrier
$44.95

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

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OEM Carrier Transformer 40VA for Model FV4BNB003T00AAAA Fan Coil

This OEM Carrier transformer is the precise replacement for the FV4BNB003T00AAAA fan coil air handler and the component that powers your system's entire low-voltage control circuit. It steps line voltage down to 24V to run the control board, thermostat, and relays. Symptoms of a failed transformer include a completely dead air handler, a low-voltage fuse that blows repeatedly, or a thermostat with no display. Built to factory specification, this transformer matches the original unit's VA rating, primary and secondary voltages, and mounting footprint, so it installs without modification. The swap is a moderate DIY job: disconnect power at the breaker, label and transfer each lead, fasten the new transformer, and restore power — typically about 30 minutes with a screwdriver and nut driver. A genuine Carrier transformer protects your control board and gives you the dependable performance that generic replacements often fall short of. We stock this part and ship it same-day on all orders placed before 3PM CST.

Compatibility

This part is compatible with Carrier model FV4BNB003T00AAAA.

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 FV4BNB003T00AAAA Fan Coil?
Yes. This is the factory-specified OEM transformer for the Carrier Model FV4BNB003T00AAAA Fan Coil. 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 FV4BNB003T00AAAA Fan Coil?
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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