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OEM Carrier Transformer 40VA 120V-24V for FX4ANF036000ACAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FX4ANF036000ACAA

SKU: CARRIE-FX4ANF036000ACAA-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 FX4ANF036000ACAA

This OEM replacement transformer (part number HT01CN236) is the factory-specified control circuit transformer for the Carrier FX4ANF036000ACAA fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the control board, thermostat, and all low-voltage switching circuits. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and the unit sits completely unresponsive despite power being present at the unit.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01CN236 | Factory-matched output voltage and VA capacity for full control circuit protection
  • OEM vs Generic: OEM transformers are wound to exact VA specifications, protecting downstream control boards from voltage fluctuations. Generic transformers with undersized VA ratings can overheat and fail prematurely, or cause erratic thermostat behavior and nuisance lockouts.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Photograph all wiring connections before removing the old transformer.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM drop-in replacement for the Carrier FX4ANF036000ACAA fan coil air handler. Verify the OEM part number HT01CN236 on your existing transformer's label before ordering. Our parts specialists are available to confirm fitment prior to purchase — same-day shipping available on all in-stock orders placed before 3PM local time.

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 FX4ANF036000ACAA?
Yes. This is the factory-specified OEM transformer for the Carrier FX4ANF036000ACAA. 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 FX4ANF036000ACAA?
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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