Same-day shipping on orders before 3PM CST · 15,000+ OEM Parts In Stock · Carrier · Bryant · ICP · Heil · Tempstar
Track Order | 1-800-NHP-HVAC | Trade Accounts

Menu

Home Shop All Account Cart
Home / OEM Carrier Transformer for Model FY5...
OEM Carrier Transformer for Model FY5BNF018T05AAAA Fan Coil Unit
Carrier

OEM Carrier Transformer for Model FY5BNF018T05AAAA Fan Coil Unit

SKU: carrier-transformer-fy5bnf018t05aaaa Brand: Carrier
$49.95

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

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

OEM Carrier Transformer for Model FY5BNF018T05AAAA Fan Coil Unit

This OEM Carrier transformer is the genuine factory replacement for the FY5BNF018T05AAAA fan coil unit. The transformer converts incoming line voltage to the 24V low-voltage control power that runs the thermostat, control board, and relays. If your fan coil is completely dead, the thermostat display is blank, or the blower won't respond to a call, a burned-out transformer is one of the most common causes. Manufactured to Carrier's exact specifications, this transformer delivers the correct secondary voltage with the proper terminal arrangement, making it a direct fit for the FY5BNF018T05AAAA with no adapters or rewiring. It's a straightforward, beginner-friendly repair for most technicians: kill the power, transfer the leads, and mount — typically under 20 minutes. A genuine OEM transformer protects your control board from the voltage irregularities that cheaper aftermarket units can cause. We stock this part and ship fast. Order before 3PM CST for same-day shipping. Our HVAC parts specialists can verify the correct transformer for your unit if you'd like to confirm before ordering.

Compatibility

This part is compatible with Carrier model FY5BNF018T05AAAA.

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 FY5BNF018T05AAAA Fan Coil Unit?
Yes. This is the factory-specified OEM transformer for the Carrier Model FY5BNF018T05AAAA Fan Coil Unit. 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 FY5BNF018T05AAAA Fan Coil Unit?
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.
Home Shop Search Account Cart