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OEM Carrier Control Transformer 40VA 208/240V–24V — SUBCLR50HJ440480
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V — SUBCLR50HJ440480

SKU: CARRIE-SUBCLR50HJ440480-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit SUBCLR50HJ440480 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 208/240V to 24V for Model SUBCLR50HJ440480

This is the genuine OEM Carrier control transformer (part #HT01BD209) factory-specified for the Carrier SUBCLR50HJ440480. The transformer steps down line voltage from 208/240V to a safe 24V signal used by the thermostat, control board, contactor coil, and all low-voltage circuits. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes will display because the board itself has no power.

  • Specs: 40VA capacity | 208/240V primary input | 24V secondary output | 50/60 Hz compatible | Class 2 control transformer | Foot-mount configuration
  • OEM vs Generic: This factory-original unit is wound to exact VA and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip internal thermal protection, or fail within one season — leading to repeat service calls and voided equipment warranties.
  • Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always label or photograph existing wiring connections before disconnecting. Verify 24V output at secondary terminals after installation before restoring system power.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier SUBCLR50HJ440480. Also cross-references and replaces legacy part numbers HT01BD207, HT01CN232, and 9076-00. Confirm your unit's voltage requirements against your data plate before ordering. Our technical team is available to verify fitment — 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 $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

Frequently Asked Questions

Does this Transformer fit my Carrier OEM Carrier Control Transformer 40VA 208/240V–24V — SUBCLR50HJ440480?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Control Transformer 40VA 208/240V–24V — SUBCLR50HJ440480. 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 OEM Carrier Control Transformer 40VA 208/240V–24V — SUBCLR50HJ440480?
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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Mike Rivera
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