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OEM Carrier Transformer 40VA 120/24V for FV4ANF003000ACAA
Carrier

OEM Carrier Transformer 40VA 120/24V for FV4ANF003000ACAA

SKU: CARRIE-FV4ANF003000ACAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V/24V for Model FV4ANF003000ACAA

This OEM replacement transformer (part number HT01CN236) is the factory-specified control circuit transformer for the Carrier FV4ANF003000ACAA fan coil air handler. Its primary function is to step down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage safety controls. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and you may detect a burning smell or a tripped fuse on the secondary side. Replacing it with the correct OEM part restores full system control immediately.

  • Specs: 40VA capacity | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN236 | Designed for Carrier fan coil applications
  • OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage tolerances, ensuring stable 24V output under full control circuit load. Generic transformers frequently deliver marginal voltage that causes nuisance lockouts, intermittent thermostat dropouts, and shortened control board life.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, needle-nose pliers, multimeter. Label or photograph all wiring connections before disconnecting. Verify secondary output voltage after installation with the system energized.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse — order by 3 PM local time for guaranteed same-day dispatch.

Compatibility: This transformer is the OEM factory replacement for the Carrier FV4ANF003000ACAA fan coil air handler. Always verify your unit's control circuit voltage requirements on the data plate or wiring diagram before ordering. If you need help confirming fitment, our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork required.

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 FV4ANF003000ACAA?
Yes. This is the factory-specified OEM transformer for the Carrier FV4ANF003000ACAA. 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 FV4ANF003000ACAA?
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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