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OEM Carrier Transformer 40VA 24V for FX4DNF031008ABAA — HT01CN241
Carrier

OEM Carrier Transformer 40VA 24V for FX4DNF031008ABAA — HT01CN241

SKU: CARRIE-FX4DNF031008ABAA-TRANSFORMER-HT01CN241 Brand: Carrier

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OEM Carrier 40VA Control Transformer for Model FX4DNF031008ABAA — Part# HT01CN241

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier FX4DNF031008ABAA air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including your thermostat, contactor coils, and control board. When it fails, the entire control circuit goes dead: the thermostat goes blank, no signals reach the air handler, and neither heating nor cooling will respond. A failed transformer is often misdiagnosed as a thermostat or control board issue, so always check transformer output voltage first with a multimeter.

  • Specs: 40VA rated | 120V primary / 24V secondary | Factory OEM part number HT01CN241 | Engineered to Carrier's exact impedance and insulation class specifications
  • OEM vs Generic: This is a genuine OEM Carrier transformer built to factory tolerances. Generic transformers frequently underperform on VA capacity, causing nuisance tripping of the secondary fuse and shortened service life under full control-circuit load.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output after installation before restoring full system power.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our fulfillment center.

Compatibility: Engineered specifically for the Carrier FX4DNF031008ABAA fan coil air handler. Confirm your unit's data plate shows part number HT01CN241 or cross-reference your existing transformer's VA and voltage ratings before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and receive same-day shipping on all in-stock components.

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 FX4DNF031008ABAA — HT01CN241?
Yes. This is the factory-specified OEM transformer for the Carrier FX4DNF031008ABAA — HT01CN241. 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 FX4DNF031008ABAA — HT01CN241?
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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