What are the specs for this Transformer?

The correct replacement for Carrier model HA1BJX024000ABAA 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 HA1BJX024000ABAA.

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 HA1BJX024000ABAA

Name: OEM Carrier Transformer 40VA 120V–24V for HA1BJX024000ABAA
Brand: Carrier
SKU: CARRIE-HA1BJX024000ABAA-TRANSFORMER-HT01AW229
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-HA1BJX024000ABAA-TRANSFORMER-HT01AW229 Brand: Carrier

✓ Guaranteed to fit HA1BJX024000ABAA — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

OEM Carrier Control Transformer 40VA for Model HA1BJX024000ABAA

This OEM control transformer (part# HT01AW229) is the factory-specified replacement for the Carrier HA1BJX024000ABAA air handler. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage control circuits. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any calls for heating or cooling, and no error codes will display because the board itself has no power.

Specs: 40VA rated | 120V primary / 24V secondary | Factory-matched OEM construction | Part number HT01AW229 — direct factory replacement with no modifications required
OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances specified by Carrier engineers. Undersized or off-tolerance generic transformers can sag under load, causing erratic thermostat behavior, nuisance lockouts, and premature control board failure.
Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching terminals). Label or photograph all low-voltage wiring connections before disconnecting the old unit.
Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier HA1BJX024000ABAA air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or wiring diagram before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork.

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 HA1BJX024000ABAA?

Yes. This is the factory-specified OEM transformer for the Carrier HA1BJX024000ABAA. 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 HA1BJX024000ABAA?

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.

Menu

OEM Carrier Transformer 40VA 120V–24V for HA1BJX024000ABAA

OEM Carrier Control Transformer 40VA for Model HA1BJX024000ABAA

Shipping Information

Return Policy

Frequently Asked Questions