What are the specs for this Transformer?

The correct replacement for Carrier model FA4BNF048008AAAA 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 FA4BNF048008AAAA.

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 FA4BNF048008AAAA

Name: OEM Carrier Transformer 40VA 120V/24V for FA4BNF048008AAAA
Brand: Carrier
SKU: CARRIE-FA4BNF048008AAAA-TRANSFORMER-HT01CN241
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-FA4BNF048008AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

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OEM Carrier 40VA Control Transformer HT01CN241 for Model FA4BNF048008AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control circuit transformer for the Carrier FA4BNF048008AAAA fan coil air handler. Its job is to step down line voltage — typically 120V — to the 24V signal voltage that powers your thermostat, control board, relays, and zone valves. When this transformer fails, absolutely nothing in the low-voltage control circuit responds: your thermostat goes dark or unresponsive, the system refuses to start, and no error codes appear because the board itself has lost power.

Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01CN241 | Factory-matched output tolerance for reliable control circuit operation
OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications for the FA4BNF048008AAAA. Generic units often underrate their VA capacity, causing premature thermal shutoff and nuisance lockouts under full control-circuit load.
Install difficulty: 2/5 — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade connectors. Verify secondary output reads 24–28V AC after install before restoring system power.
Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier FA4BNF048008AAAA fan coil air handler. Always confirm primary voltage on your unit's data plate matches before ordering. If your system uses a different VA-rated transformer, our fitment team is available to verify compatibility before you purchase — same-day shipping guaranteed on in-stock OEM parts.

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 FA4BNF048008AAAA?

Yes. This is the factory-specified OEM transformer for the Carrier FA4BNF048008AAAA. 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 FA4BNF048008AAAA?

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 FA4BNF048008AAAA

OEM Carrier 40VA Control Transformer HT01CN241 for Model FA4BNF048008AAAA

Shipping Information

Return Policy

Frequently Asked Questions