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OEM Carrier Transformer 40VA 208/240V–24V for SUBCLR50HJ440476
Carrier

OEM Carrier Transformer 40VA 208/240V–24V for SUBCLR50HJ440476

SKU: CARRIE-SUBCLR50HJ440476-TRANSFORMER-HT01BD209 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 208/240V–24V for Model SUBCLR50HJ440476

This OEM Carrier control transformer (part # HT01BD209) is the factory-specified replacement for the Carrier SUBCLR50HJ440476. The transformer steps down line voltage from 208/240V primary to a stable 24V secondary output, powering the low-voltage control circuit that governs your thermostat, control board, contactor coil, and safety switches. When this part fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, no contactor pull-in, or a system that won't start under any call for heating or cooling.

  • Specs: 40VA rated | 208/240V primary input | 24V secondary output | 50/60 Hz | OEM part # HT01BD209 | Replaces HT01BD207, HT01CN232, and 9076-00
  • OEM vs Generic: OEM Carrier transformers are wound to precise VA and voltage tolerances, protecting sensitive control boards from voltage sag or spike. Aftermarket units with loose tolerances can cause erratic board behavior or premature board failure — making OEM the safer long-term investment.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label all low-voltage wires before disconnecting. Swap wire for wire to the same terminals on the new transformer.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model SUBCLR50HJ440476. Also cross-references to HT01BD207, HT01CN232, and 9076-00 for broader Carrier, Bryant, and Payne equipment compatibility. Always verify your unit's data plate voltage specifications before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you order — reach out today and we'll ship the same business day.

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

Frequently Asked Questions

Does this Transformer fit my Carrier SUBCLR50HJ440476?
Yes. This is the factory-specified OEM transformer for the Carrier SUBCLR50HJ440476. 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 SUBCLR50HJ440476?
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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