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OEM Carrier Transformer 40VA 120V/24V for FA4ANC024010AGAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FA4ANC024010AGAA

SKU: CARRIE-FA4ANC024010AGAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Transformer 40VA 120V/24V for Model FA4ANC024010AGAA

This OEM replacement transformer (part number HT01CN236) is the factory-specified control circuit transformer for the Carrier FA4ANC024010AGAA fan coil air handler. Its job is to step down line voltage from 120V to the 24V signal voltage required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this transformer fails, absolutely nothing in the control circuit responds — the thermostat goes blank, the system will not call for heating or cooling, and the unit sits completely dead despite having full line power. A failed transformer is also one of the most commonly misdiagnosed faults; always verify 24V output at the secondary terminals with a multimeter before condemning the control board.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Class 2 control circuit transformer | OEM part number HT01CN236 | Factory-matched output tolerance for reliable low-voltage signal integrity
  • OEM vs Generic: This is the exact factory OEM unit. Generic transformers frequently run under-rated VA loads, causing voltage sag that triggers nuisance lockouts, erratic thermostat behavior, and premature contactor coil failure. OEM ensures the VA capacity your system was engineered to run.
  • Install difficulty: 2/5 — Shut off all power to the air handler at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Photograph all wiring before removal. Confirm 24V output on secondary after installation before closing the cabinet.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier FA4ANC024010AGAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment 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 $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 FA4ANC024010AGAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANC024010AGAA. 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 FA4ANC024010AGAA?
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