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OEM Carrier Transformer 40VA 120V-24V for FY5BNF024T00AAAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FY5BNF024T00AAAA

SKU: CARRIE-FY5BNF024T00AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer HT01CN241 for Model FY5BNF024T00AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control transformer for the Carrier FY5BNF024T00AAAA fan coil unit. The transformer steps down line voltage (120V) to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dark — the thermostat becomes unresponsive, relays won't energize, and the system will not heat or cool. A failed transformer is often indicated by a tripped secondary fuse or a completely unresponsive system despite good line power at the unit.

  • Specs: Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01CN241 | Factory-matched electrical tolerances for Carrier fan coil applications
  • OEM vs Generic: This is the genuine Carrier OEM transformer, wound and rated to exact factory specifications. Generic transformers may carry undersized VA ratings or lower-grade core laminations, leading to overheating, premature burnout, and potential damage to connected control boards.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Always verify 0V at the primary terminals before touching any wiring. Label all low-voltage connections prior to removal.
  • Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier FY5BNF024T00AAAA fan coil unit. Confirm your existing transformer's input/output voltage and VA rating against your unit's data plate before ordering. Our parts specialists are available to verify fitment — reach out before you order if you have any questions. Orders placed before 3 PM ship the same business day.

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

Frequently Asked Questions

Does this Transformer fit my Carrier FY5BNF024T00AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF024T00AAAA. 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 FY5BNF024T00AAAA?
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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