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OEM Carrier Transformer 40VA 120V/24V for FY4ANF030008AAAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FY4ANF030008AAAA

SKU: CARRIE-FY4ANF030008AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V/24V for Model FY4ANF030008AAAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier FY4ANF030008AAAA 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 this transformer fails, the entire control system goes dark: your thermostat will appear blank or unresponsive, and the system will not heat, cool, or respond to any inputs. A failed transformer is often confirmed by measuring 0V on the secondary (24V) side while 120V is present on the primary.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN241 | Factory-matched for Carrier FY4ANF030008AAAA control circuit requirements
  • OEM vs Generic: This is a genuine Carrier OEM transformer built to exact VA and voltage tolerances. Generic transformers with loose tolerances can under-deliver on the 24V side, causing intermittent lockouts, nuisance tripping, or premature control board failure.
  • Install difficulty: 2/5 — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade terminals. Label all low-voltage wiring before disconnecting. Confirm 120V primary is fully de-energized before handling.
  • Warranty: 1-year OEM factory warranty against defects. In-stock units ship the same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier FY4ANF030008AAAA fan coil unit. Always verify the OEM part number HT01CN241 against your unit's data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get your control circuit back online fast.

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 FY4ANF030008AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY4ANF030008AAAA. 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 FY4ANF030008AAAA?
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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