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OEM Carrier Transformer 40VA 120V-24V for FV4CNB006L00ABAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FV4CNB006L00ABAA

SKU: CARRIE-FV4CNB006L00ABAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model FV4CNB006L00ABAA

This OEM step-down transformer (part# HT01CN236) is the factory-specified replacement for the Carrier FV4CNB006L00ABAA fan coil air handler. The transformer converts 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, control board, and zone controls. When this component fails, the result is a completely unresponsive system: no thermostat display, no fan operation, and no heating or cooling regardless of settings. A blown transformer is often traced to a shorted low-voltage wire, a failed control board, or a wiring mistake during installation, so always inspect the secondary circuit before replacing.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN236 | Factory-matched output voltage for reliable low-voltage circuit performance
  • OEM vs Generic: This OEM unit is wound and rated to Carrier's exact factory specifications, ensuring stable 24V output under full load. Generic transformers may deliver inconsistent voltage, causing erratic thermostat behavior, nuisance lockouts, or premature control board failure.
  • Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Verify 24V output with a multimeter after installation before restoring full system power. Photograph all wiring connections prior to removal.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier FV4CNB006L00ABAA fan coil air handler. Confirm your unit's control circuit voltage and VA requirement on the data plate before ordering. If you're unsure of fitment or need help cross-referencing part number HT01CN236, our HVAC parts specialists are available to verify 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 FV4CNB006L00ABAA?
Yes. This is the factory-specified OEM transformer for the Carrier FV4CNB006L00ABAA. 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 FV4CNB006L00ABAA?
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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