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OEM Carrier Transformer 40VA 24V for FX4ANF030000ABAA — HT01CN236
Carrier

OEM Carrier Transformer 40VA 24V for FX4ANF030000ABAA — HT01CN236

SKU: CARRIE-FX4ANF030000ABAA-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 FX4ANF030000ABAA

This OEM replacement transformer (part number HT01CN236) is the factory-specified 24V control circuit transformer for the Carrier FX4ANF030000ABAA fan coil air handler. The transformer steps down line voltage (120V) to the 24V signal voltage required to power your thermostat, control board, and all low-voltage system controls. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to calls for cooling or heating, and nothing operates despite power being present at the unit.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01CN236 | Direct plug-and-play replacement with factory wiring harness compatibility
  • OEM vs Generic: This factory OEM transformer is wound to exact VA and voltage specifications for the FX4ANF030000ABAA. Generic transformers frequently run under-rated VA, causing premature thermal cutout trips and repeated nuisance failures — especially under multi-zone thermostat loads.
  • Install Difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Note primary and secondary wiring connections before disconnecting old unit. Confirm 24V output with a multimeter after installation before restoring full system power.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier FX4ANF030000ABAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists can confirm compatibility before you buy — 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 FX4ANF030000ABAA — HT01CN236?
Yes. This is the factory-specified OEM transformer for the Carrier FX4ANF030000ABAA — HT01CN236. 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 FX4ANF030000ABAA — HT01CN236?
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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