What are the specs for this Transformer?

The correct replacement for Carrier model FH4CNF002000AAAA is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number FH4CNF002000AAAA.

Is this transformer compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Carrier

OEM Carrier Transformer 40VA 120V/24V for FH4CNF002000AAAA

Name: OEM Carrier Transformer 40VA 120V/24V for FH4CNF002000AAAA
Brand: Carrier
SKU: CARRIE-FH4CNF002000AAAA-TRANSFORMER-HT01CN241
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-FH4CNF002000AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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OEM Carrier 40VA Control Transformer HT01CN241 for Model FH4CNF002000AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control transformer for the Carrier FH4CNF002000AAAA fan coil air handler. The transformer steps down 120V line voltage to the 24V signal voltage required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat loses communication, the system will not respond to calls for heating or cooling, and no components will energize. A failed transformer is often mistaken for a bad thermostat or control board, making correct diagnosis critical before replacement.

Specs: 40VA rated | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01CN241 | Direct factory replacement with matched impedance and thermal protection
OEM vs Generic: This OEM transformer is wound to Carrier's exact VA rating and thermal cutout spec. Generic transformers frequently underperform at full load, causing nuisance trips, brownouts in the 24V circuit, and premature failure of downstream components like contactors and control boards.
Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label all low-voltage wiring before disconnecting and confirm primary and secondary leads are correctly terminated to avoid immediate burnout.
Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier FH4CNF002000AAAA fan coil air handler. Always verify the VA rating and primary/secondary voltages on your unit's data plate before ordering to ensure proper fitment. Our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping available on all in-stock OEM transformers.

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

OEM Carrier Transformer 40VA 120...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier FH4CNF002000AAAA?

Yes. This is the factory-specified OEM transformer for the Carrier FH4CNF002000AAAA. 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 FH4CNF002000AAAA?

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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OEM Carrier Transformer 40VA 120V/24V for FH4CNF002000AAAA

OEM Carrier 40VA Control Transformer HT01CN241 for Model FH4CNF002000AAAA

Shipping Information

Return Policy

Frequently Asked Questions