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OEM Carrier Transformer 40VA 120V/24V for FE4ANF005000AAAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FE4ANF005000AAAA

SKU: CARRIE-FE4ANF005000AAAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer HT01CN236 for Model FE4ANF005000AAAA

This OEM control transformer (part number HT01CN236) is the factory-specified replacement for the Carrier FE4ANF005000AAAA fan coil air handler. The transformer steps line voltage (120V) down to the 24V signal voltage required to power your thermostat, control board, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any calls for heating or cooling, and nothing works despite power being present at the unit.

  • Specs: 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01CN236 | Factory-matched output tolerance for stable low-voltage control
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications for the FE4ANF005000AAAA control circuit. Undersized or off-tolerance aftermarket units can drop voltage under load, causing erratic thermostat behavior, nuisance lockouts, or premature control board failure.
  • Install difficulty: 2/5 — Shut off all power to the air handler before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or push-in connectors. Photograph all existing wiring connections before disconnecting. Confirm primary and secondary terminals before energizing.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier FE4ANF005000AAAA fan coil air handler. Verify your existing transformer's VA rating and input/output voltages on the data plate or wiring diagram inside the unit before ordering. Our parts specialists are available to confirm fitment — reach out before you buy if you have any questions. Order today and receive same-day shipping on all in-stock OEM parts.

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 FE4ANF005000AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FE4ANF005000AAAA. 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 FE4ANF005000AAAA?
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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