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Carrier

OEM Carrier Transformer EAC1B100 for Model FA4BNF036010AAAA

SKU: carrier-transformer-fa4bnf036010aaaa 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 EAC1B100 for Model FA4BNF036010AAAA

This genuine OEM Carrier transformer converts incoming line voltage to the 24-volt control power that runs the thermostat, contactor, and relays in your FA4BNF036010AAAA air handler. If the transformer fails, the entire low-voltage control circuit goes dead—your thermostat blanks out and the system ignores all heating and cooling calls. Built to exact Carrier specifications, this transformer supplies stable, properly regulated control voltage for safe, consistent operation. It commonly fails after power surges, wiring shorts, or a welded contactor, so a factory-matched replacement is the reliable fix. This unit matches the FA4BNF036010AAAA for correct primary and secondary ratings plus mounting fit. Installation is a moderate job best left to a qualified technician because of the low-voltage wiring involved—usually 30 to 45 minutes with power disconnected. Confirm your wire connections match the original before restoring power. Order before 3PM CST and your transformer ships the same business day so comfort returns quickly. Choose genuine Carrier parts for dependable, long-lasting performance.

Compatibility

This part is compatible with Carrier model FA4BNF036010AAAA.

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 FA4BNF036010AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4BNF036010AAAA. 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 FA4BNF036010AAAA?
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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