What are the specs for this Transformer?

The correct replacement for Carrier model SUBCLR50HJ402498 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 SUBCLR50HJ402498.

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 208/230V–24V for SUBCLR50HJ402498

Name: OEM Carrier Transformer 40VA 208/230V–24V for SUBCLR50HJ402498
Brand: Carrier
SKU: CARRIE-SUBCLR50HJ402498-TRANSFORMER-HT01BD209
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-SUBCLR50HJ402498-TRANSFORMER-HT01BD209 Brand: Carrier

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OEM Carrier Control Transformer 40VA 208/230V to 24V — Part HT01BD209 for Model SUBCLR50HJ402498

This genuine OEM Carrier control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier SUBCLR50HJ402498. The transformer steps down 208/230V line voltage to the 24V low-voltage signal required to power thermostats, control boards, contactors, and all other low-voltage components. When this transformer fails, the entire control circuit goes dark — thermostats become unresponsive, the system will not heat or cool, and no fault codes will display because the board itself has lost power.

Specs: 40VA output | Primary voltage: 208/230V | Secondary voltage: 24V | 50/60 Hz | Weight: 1.0 lb | OEM part number: HT01BD209
OEM vs Generic: This is a genuine Carrier OEM transformer engineered to exact VA and voltage tolerances. Generic substitutes often run under-rated VA loads, causing overheating, nuisance tripping of the secondary fuse, and premature control board failure.
Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wires). Label or photograph all wiring before disconnecting. This part replaces legacy Carrier part numbers HT01BD207 and HT01CN232.
Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for Carrier model SUBCLR50HJ402498. Always verify your unit's data plate voltage requirements match 208/230V primary input before ordering. Our fitment team is available to confirm compatibility prior to purchase — don't guess on a transformer.

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 208...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier SUBCLR50HJ402498?

Yes. This is the factory-specified OEM transformer for the Carrier SUBCLR50HJ402498. 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 SUBCLR50HJ402498?

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 208/230V–24V for SUBCLR50HJ402498

OEM Carrier Control Transformer 40VA 208/230V to 24V — Part HT01BD209 for Model SUBCLR50HJ402498

Shipping Information

Return Policy

Frequently Asked Questions