What are the specs for this Transformer?

The correct replacement for Carrier model HA1BJX024000AEAA 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 HA1BJX024000AEAA.

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 HA1BJX024000AEAA

Name: OEM Carrier Transformer 40VA 120V/24V for HA1BJX024000AEAA
Brand: Carrier
SKU: CARRIE-HA1BJX024000AEAA-TRANSFORMER-HT01AW229
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-HA1BJX024000AEAA-TRANSFORMER-HT01AW229 Brand: Carrier

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OEM Carrier 40VA Control Transformer HT01AW229 for Model HA1BJX024000AEAA

This OEM replacement control transformer (part# HT01AW229) is the factory-specified unit for the Carrier HA1BJX024000AEAA air handler. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching components. When this transformer fails — due to a wiring short, voltage spike, or age — absolutely nothing in the system will respond: the thermostat goes dark, the blower won't run, and no heating or cooling calls are processed. If you've confirmed 120V at the air handler but zero voltage on the secondary side, this is your part.

Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 transformer | Replaces OEM part number HT01AW229
OEM vs Generic: This factory OEM unit is wound to exact VA and voltage tolerances for the Carrier HA1BJX024000AEAA. Off-brand transformers may underperform under load, causing nuisance lockouts or premature control board failures due to voltage sag.
Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before removal. Verify 0V at all terminals before touching leads.
Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier HA1BJX024000AEAA air handler. Confirm your existing transformer reads 40VA 120V/24V on its label before ordering. If your unit has been modified or rewired, verify secondary load does not exceed 40VA. Our fitment team is available to confirm compatibility before you buy — order with confidence and get your system back online today.

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 $99
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 HA1BJX024000AEAA?

Yes. This is the factory-specified OEM transformer for the Carrier HA1BJX024000AEAA. 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 HA1BJX024000AEAA?

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 HA1BJX024000AEAA

OEM Carrier 40VA Control Transformer HT01AW229 for Model HA1BJX024000AEAA

Shipping Information

Return Policy

Frequently Asked Questions