What are the specs for this Transformer?

The correct replacement for Carrier model FA4ANF030000AGAA 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 FA4ANF030000AGAA.

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 FA4ANF030000AGAA

Name: OEM Carrier Transformer 40VA 120V-24V for FA4ANF030000AGAA
Brand: Carrier
SKU: CARRIE-FA4ANF030000AGAA-TRANSFORMER-HT01CN236
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-FA4ANF030000AGAA-TRANSFORMER-HT01CN236 Brand: Carrier

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OEM Carrier Control Transformer 40VA for Model FA4ANF030000AGAA

This is the factory OEM replacement transformer (part# HT01CN236) for the Carrier FA4ANF030000AGAA air handler. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the result is total system silence: the thermostat goes blank, nothing responds, and no error codes appear because the control circuit has lost power entirely.

Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN236 | Factory-matched to Carrier FA4ANF030000AGAA air handler specifications
OEM vs Generic: The OEM HT01CN236 transformer is wound and rated to Carrier's exact VA and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip their internal thermal fuse prematurely, or deliver unstable 24V output that causes erratic board behavior and nuisance lockouts.
Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, needle-nose pliers, multimeter (to confirm 24V output after install). Photograph all low-voltage wiring connections before removing the old unit.
Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse — get your system back online fast.

Compatibility: Engineered specifically for the Carrier FA4ANF030000AGAA air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment prior to purchase — order with confidence.

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 FA4ANF030000AGAA?

Yes. This is the factory-specified OEM transformer for the Carrier FA4ANF030000AGAA. 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 FA4ANF030000AGAA?

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 FA4ANF030000AGAA

OEM Carrier Control Transformer 40VA for Model FA4ANF030000AGAA

Shipping Information

Return Policy

Frequently Asked Questions