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OEM Carrier Transformer 40VA 120V-24V for FA4ANF030015AFAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FA4ANF030015AFAA

SKU: CARRIE-FA4ANF030015AFAA-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 FA4ANF030015AFAA

This OEM control transformer (part# HT01CN236) is the factory-specified replacement for the Carrier FA4ANF030015AFAA fan coil air handler. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, control board, contactor coil, and all low-voltage accessories. When the transformer fails, the entire control circuit goes dark — the thermostat loses power, the system stops responding to calls for cooling or heating, and nothing operates. It is often the first component to suspect when the system is completely unresponsive and all fuses check good.

  • Specs: 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01CN236 | Factory-matched output tolerance for stable control circuit operation
  • OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact VA and voltage specifications. Generic transformers frequently run underrated VA, causing overheating, nuisance blown fuses, and premature failure — especially when multiple accessories (humidifiers, zoning boards, UV lights) share the 24V circuit.
  • Install difficulty: 2/5 — Shut off power at the breaker and confirm voltage is absent before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Photograph or label all wiring connections before disconnecting. Confirm primary and secondary terminals match your existing wiring color codes.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered specifically for the Carrier FA4ANF030015AFAA fan coil air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or wiring diagram before ordering to ensure a direct drop-in fit. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — add to cart or contact us today and get back up and running 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 FA4ANF030015AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANF030015AFAA. 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 FA4ANF030015AFAA?
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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