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OEM Carrier Transformer 40VA 120/240V-24V for FY5BNF048000AAAA
Carrier

OEM Carrier Transformer 40VA 120/240V-24V for FY5BNF048000AAAA

SKU: CARRIE-FY5BNF048000AAAA-TRANSFORMER-HT01CN241 Brand: Carrier
✓ Guaranteed to fit FY5BNF048000AAAA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Transformer HT01CN241 for Model FY5BNF048000AAAA

This OEM control circuit transformer (part# HT01CN241) is the factory-specified replacement for the Carrier FY5BNF048000AAAA fan coil unit. The transformer steps down line voltage (120V or 240V) to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system will not respond to any calls for heating or cooling, and there is no 24V present at the board. A failed transformer is often caused by a shorted component downstream, so always inspect the control circuit for wiring faults before installing the replacement.

  • Specs: 40VA rating | Primary: 120V/240V | Secondary: 24V AC output | OEM part number HT01CN241 | Direct plug-in replacement with factory-matched VA rating
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications, ensuring stable 24V output under full load. Generic units frequently run underrated VA, causing voltage sag that damages control boards and contactors over time.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify 24V output after installation before restoring full system operation.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier FY5BNF048000AAAA fan coil unit. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — same-day shipping on all in-stock orders.

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 FY5BNF048000AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF048000AAAA. 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 FY5BNF048000AAAA?
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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