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OEM Carrier Transformer 40VA 120V/24V for FA4ANF024000AFAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FA4ANF024000AFAA

SKU: CARRIE-FA4ANF024000AFAA-TRANSFORMER-HT01CN236 Brand: Carrier
✓ Guaranteed to fit FA4ANF024000AFAA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model FA4ANF024000AFAA Air Handler

This is the factory OEM replacement transformer (part# HT01CN236) for the Carrier FA4ANF024000AFAA fan coil air handler. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit loses power: the thermostat goes blank, the system won't respond to any calls for cooling or heating, and nothing runs. A failed transformer is often misdiagnosed as a thermostat or control board issue, so always verify 24V output at the secondary terminals before replacing other components.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement for part number HT01CN236 | Screw-terminal or quick-connect wiring (verify against your unit)
  • OEM vs Generic: This OEM transformer is wound and rated to Carrier's exact factory specifications. Generic transformers frequently carry undersized VA ratings that cause overheating, nuisance tripping, and premature failure — especially when multiple 24V accessories are wired to the circuit.
  • Install Difficulty: 2/5 — Shut off all power to the air handler at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Photograph existing wiring connections before removing the old transformer. Verify 24V output with a multimeter after installation before restoring full system power.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier FA4ANF024000AFAA fan coil air handler. Confirm your unit's control transformer VA and voltage ratings on the data plate inside the cabinet door before ordering. Our parts specialists are available to verify fitment — contact us before you order if you have any questions. In stock and ships today.

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 $99
  • 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 FA4ANF024000AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANF024000AFAA. 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 FA4ANF024000AFAA?
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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