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OEM Carrier Transformer 40VA 120V/24V for FY5BNF030T08AAAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FY5BNF030T08AAAA

SKU: CARRIE-FY5BNF030T08AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF030T08AAAA

This OEM control circuit transformer (part number HT01CN241) is the factory-specified replacement for the Carrier FY5BNF030T08AAAA fan coil unit. The transformer steps line voltage down from 120V to 24V AC, powering the low-voltage control circuit that runs your thermostat, contactor coil, and control board. When this component fails, the entire control system goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes appear because the board itself has no power.

  • Specs: 120V primary | 24V secondary output | 40VA rated | OEM part number HT01CN241 | Factory-matched windings and insulation class
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances for the FY5BNF030T08AAAA control circuit. Undersized or off-spec generic units can overheat under load, trip thermal cutoffs, and damage downstream control boards — a far costlier repair.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Mount securely and confirm no wire insulation contacts the transformer core.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model FY5BNF030T08AAAA fan coil units. Confirm your unit's data plate lists 120V primary / 24V secondary and 40VA rating before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you purchase — no guesswork, no return hassle.

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 FY5BNF030T08AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF030T08AAAA. 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 FY5BNF030T08AAAA?
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
HVAC Parts Specialist — Online