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OEM Carrier Transformer 40VA 120V/24V for FY5BNF036L00AAAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FY5BNF036L00AAAA

SKU: CARRIE-FY5BNF036L00AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V/24V for Model FY5BNF036L00AAAA

This is the OEM factory-specified control transformer (part number HT01CN241) for the Carrier FY5BNF036L00AAAA fan coil unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control system goes dark: your thermostat loses power, the system won't respond to calls for heating or cooling, and you may find a blown fuse on the control board. A failed transformer is often misdiagnosed as a board failure, so always check transformer output voltage first with a multimeter before replacing more expensive components.

  • Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01CN241 | Direct drop-in replacement with factory-matched terminals
  • OEM vs Generic: This OEM unit is wound to Carrier's exact VA and voltage tolerance specifications. Generic transformers frequently run under-rated VA, causing nuisance tripping, overheating, and premature failure — especially in systems with high control circuit loads.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label all low-voltage wires before disconnecting. Verify 24V output at secondary terminals before reassembling the unit.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FY5BNF036L00AAAA fan coil unit. Cross-reference your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — contact us anytime.

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 FY5BNF036L00AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF036L00AAAA. 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 FY5BNF036L00AAAA?
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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