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Carrier

OEM Carrier Transformer for Air Handler Model FB4ANF036005AFAA

SKU: carrier-transformer-fb4anf036005afaa 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 for Air Handler Model FB4ANF036005AFAA

Power your control circuit correctly with this genuine OEM Carrier transformer for the FB4ANF036005AFAA fan coil air handler. The transformer steps down incoming line voltage to the low-voltage power (typically 24V) your thermostat, control board, and relays depend on. When a transformer fails, you'll often see a completely dead thermostat, an unresponsive control board, or a system that won't power up at all. This OEM replacement is built to the precise voltage and VA rating Carrier specified for the FB4ANF036005AFAA, ensuring proper power delivery and full compatibility. Installation is moderate and best for those comfortable with electrical work: disconnect all power, label and photograph the primary and secondary leads, mount the new transformer, and reconnect the wiring exactly as before. Most swaps take 30 minutes or less; a technician can handle it quickly if you'd rather not. Order before 3 PM CST for same-day shipping and restore power to your system fast. Genuine Carrier quality means safe, dependable operation.

Compatibility

This part is compatible with Carrier model FB4ANF036005AFAA.

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 Air Handler Model FB4ANF036005AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier Air Handler Model FB4ANF036005AFAA. 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 Air Handler Model FB4ANF036005AFAA?
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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