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Carrier

OEM Carrier Transformer for Model FB4ANF036000AFAA Fan Coil

SKU: carrier-transformer-fb4anf036000afaa Brand: Carrier
$39.95

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

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OEM Carrier Transformer for Model FB4ANF036000AFAA Fan Coil

This genuine OEM Carrier transformer is the factory replacement for the FB4ANF036000AFAA fan coil air handler. The transformer steps line voltage down to the 24V control voltage that powers your thermostat, control board, and relays — without it, the entire low-voltage control circuit goes dead. Common signs of a failed transformer are a blank thermostat, no response to heat or cool calls, or a tripped internal fuse after a short. Wound and rated to Carrier's exact primary and secondary specifications, this transformer matches the original mounting and terminal configuration on the FB4ANF036000AFAA for a clean, direct fit. Installation is rated easy to moderate and takes about 20-30 minutes: disconnect power, label and transfer the primary and secondary leads, then mount the replacement. We recommend basic electrical comfort or a qualified technician. Restore stable 24V control power and reliable system operation with a true OEM part. In stock and ready to ship — orders placed before 3PM CST ship the same business day.

Compatibility

This part is compatible with Carrier model FB4ANF036000AFAA.

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 FB4ANF036000AFAA Fan Coil?
Yes. This is the factory-specified OEM transformer for the Carrier Model FB4ANF036000AFAA 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 FB4ANF036000AFAA 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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