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OEM Carrier Transformer 40VA 120V-24V for FY5BNF030010AAAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FY5BNF030010AAAA

SKU: CARRIE-FY5BNF030010AAAA-TRANSFORMER-HT01CN241 Brand: Carrier
✓ Guaranteed to fit FY5BNF030010AAAA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA for Model FY5BNF030010AAAA

This OEM control transformer (part# HT01CN241) is the factory-specified replacement for the Carrier FY5BNF030010AAAA fan coil unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the entire control system loses power: the thermostat goes dark, the system won't respond to any calls for heating or cooling, and you may notice a burning smell or a tripped secondary-side fuse.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01CN241 | Factory-matched impedance and winding tolerance for reliable low-voltage output
  • OEM vs Generic: This is the genuine Carrier OEM transformer, engineered to exact VA and voltage specifications for the FY5BNF030010AAAA. Generic transformers often underrate their VA capacity, causing overheating and premature failure under normal HVAC control loads.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Always verify 0V at primary terminals before handling. Label wiring connections before removing the old unit.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier FY5BNF030010AAAA fan coil unit. Verify your existing transformer's primary voltage (120V) and VA rating (40VA) against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.

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 $99
  • 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 info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier FY5BNF030010AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF030010AAAA. 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 FY5BNF030010AAAA?
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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Mike Rivera
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