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Carrier

OEM Carrier Transformer Replacement for Model FA4CNF036010AAAA

SKU: carrier-transformer-fa4cnf036010aaaa Brand: Carrier
$54.95

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 FA4CNF036010AAAA

This genuine OEM Carrier transformer converts line voltage into the low-voltage control power that runs the thermostat, relays, and control board in your Carrier FA4CNF036010AAAA fan coil unit. When the transformer fails, the system loses its 24V control power, leaving the thermostat blank and the equipment completely unresponsive. Built to exact factory primary and secondary voltage ratings, this transformer is a direct-fit replacement for the FA4CNF036010AAAA, supplying the correct VA capacity for the unit's control circuit. Because a blown transformer often stems from a wiring short or power surge, a technician should pinpoint the root cause before fitting the new part. Installation is moderate in difficulty: disconnect power, transfer the primary and secondary leads to matching terminals, and confirm output with a meter. Opting for the OEM transformer ensures the proper load rating and protects downstream components from damage. We keep this transformer in stock and ship same-day on all orders placed before 3PM CST, so your Carrier repair stays on track. Restore reliable control power with the authentic factory part.

Compatibility

This part is compatible with Carrier model FA4CNF036010AAAA.

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 FA4CNF036010AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4CNF036010AAAA. 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 FA4CNF036010AAAA?
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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