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OEM Carrier Transformer 40VA 120V-24V for FY5BNF024T10AAAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FY5BNF024T10AAAA

SKU: CARRIE-FY5BNF024T10AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01CN241 for Model FY5BNF024T10AAAA

This OEM Carrier control transformer (part number HT01CN241) is the factory-specified replacement for the FY5BNF024T10AAAA fan coil unit. The transformer steps down line voltage (120V) to the 24V signal required by the control board, thermostat, and all low-voltage control circuits. When this component fails, the entire control circuit goes dark — your thermostat becomes unresponsive, the system won't call for heating or cooling, and nothing operates. A failed transformer is one of the most commonly misdiagnosed HVAC faults, often mistaken for a bad control board or thermostat.

  • Specs: 40VA rating | 120V primary voltage | 24V secondary output | Factory-matched winding insulation class | Compact form factor sized for OEM bracket mount
  • OEM vs Generic: OEM transformers like this HT01CN241 use factory-wound cores that maintain voltage regulation under load. Generic units frequently sag under peak demand, causing erratic thermostat behavior and nuisance lockouts over time.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Confirm secondary output voltage (24V AC) at the control board connector after installation to verify correct operation.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before 3 PM EST ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FY5BNF024T10AAAA fan coil unit. Always verify the 40VA rating and 120V/24V configuration against your unit's wiring diagram and data plate before ordering. Our fitment team is available to confirm compatibility — contact us before you order if you have any questions.

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 FY5BNF024T10AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF024T10AAAA. 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 FY5BNF024T10AAAA?
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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