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Carrier

OEM Carrier Transformer Replacement for Model FB4BNF036008AAAA

SKU: carrier-transformer-fb4bnf036008aaaa Brand: Carrier
$59.95

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

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OEM Carrier Transformer Replacement for Model FB4BNF036008AAAA

This genuine OEM Carrier transformer steps down line voltage to the low-voltage power your FB4BNF036008AAAA fan coil needs to run its control board, thermostat, and relays. When your thermostat goes blank, the system won't respond to calls for heating or cooling, or low-voltage fuses keep blowing, a failed transformer is a frequent cause. This OEM replacement is built to Carrier's exact primary and secondary voltage ratings, ensuring safe, stable control-circuit power and proper system operation. It is a direct-fit match for the FB4BNF036008AAAA, so no adapters or rewiring are required. Installation difficulty is moderate and best performed by a licensed HVAC technician; plan on 20 to 30 minutes to mount the unit and transfer wiring. Always shut off power at the breaker before servicing the control circuit. Order before 3PM CST and your transformer ships same-day to keep downtime to a minimum. Rely on genuine OEM parts for correct voltage specs, precise fit, and long-term dependability.

Compatibility

This part is compatible with Carrier model FB4BNF036008AAAA.

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 FB4BNF036008AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FB4BNF036008AAAA. 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 FB4BNF036008AAAA?
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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