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OEM Carrier Transformer 40VA 120V/24V for FA4ANC048010AGAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FA4ANC048010AGAA

SKU: CARRIE-FA4ANC048010AGAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01CN236 for Model FA4ANC048010AGAA

This OEM control transformer (part number HT01CN236) is the factory-specified replacement for the Carrier FA4ANC048010AGAA fan coil air handler. The transformer steps down 120V line voltage to the 24V AC signal required to power your thermostat, control board, and all low-voltage switching components. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing works despite line power being present at the unit.

  • Specs: 40VA capacity | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN236 | Factory-matched output for Carrier low-voltage control circuits
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance aftermarket units can cause nuisance tripping, board damage, or repeated fuse failures — costing far more than the price difference.
  • Install difficulty: 2/5 — Always disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts or terminal connectors. Confirm the secondary fuse or inline fuse is not blown before condemning the transformer.
  • Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier FA4ANC048010AGAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. If you're unsure of fitment, our HVAC parts specialists confirm compatibility before your order ships — 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 FA4ANC048010AGAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANC048010AGAA. 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 FA4ANC048010AGAA?
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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