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OEM Carrier Transformer 40VA 120V→24V for FA4ANF048015AFAA
Carrier

OEM Carrier Transformer 40VA 120V→24V for FA4ANF048015AFAA

SKU: CARRIE-FA4ANF048015AFAA-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 FA4ANF048015AFAA

This OEM control transformer (part# HT01CN236) is the factory-specified replacement for the Carrier FA4ANF048015AFAA fan coil air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching circuits. When it fails, absolutely nothing in the control system responds — the thermostat goes dark, the system won't call for heating or cooling, and no error codes are generated because the board itself has no power.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01CN236 | Meets original equipment electrical tolerances
  • OEM vs Generic: The OEM Carrier transformer is wound and insulated to exact VA and thermal specifications. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs, or fail prematurely — especially when multiple accessories (humidifiers, zone controllers, UV lights) share the 24V circuit.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify voltage is off with a multimeter before beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire stripper, wire nuts or push-in connectors. Label all low-voltage wires before disconnecting. Reinstallation is straightforward but verify VA load does not exceed transformer rating before powering up.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FA4ANF048015AFAA fan coil air handler. Always confirm primary voltage (120V) and VA rating on your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase — just reach out before placing your order.

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 FA4ANF048015AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANF048015AFAA. 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 FA4ANF048015AFAA?
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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