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OEM Carrier Transformer 40VA 230V/115V for 09DE084600 — HT01BC208
Carrier

OEM Carrier Transformer 40VA 230V/115V for 09DE084600 — HT01BC208

SKU: CARRIE-09DE084600-TRANSFORMER-HT01BC208 Brand: Carrier

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OEM Carrier Control Transformer 40VA 230V/115V for Model 09DE084600 — HT01BC208

This OEM Carrier transformer (part number HT01BC208) is the factory-specified replacement for the Carrier 09DE084600. The transformer is the heartbeat of your HVAC system's control circuit — it steps down line voltage to the low-voltage signal that powers your thermostat, control board, and safety switches. When it fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and no fault codes appear because the board itself has no power.

  • Specs: 40VA capacity | 230V primary voltage | 115V secondary voltage | 50/60 Hz | OEM Totaline Carrier/Bryant/Payne factory part
  • OEM vs Generic: This is a genuine OEM part manufactured to exact Carrier factory tolerances. Generic transformers often use lower-grade core materials that overheat under continuous load, causing premature failure and nuisance tripping of the built-in thermal fuse.
  • Install Difficulty: 2/5 — Shut off all power at the breaker before beginning. Label and photograph all low-voltage wiring connections before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm output voltage after install). Most experienced DIYers complete this repair in under 30 minutes.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for the Carrier 09DE084600. Also cross-references part numbers 320659-301 and 2-05757-1. Verify your unit's primary voltage and VA rating on the data plate before ordering. Our HVAC parts specialists are available to confirm fitment — 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 $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 09DE084600 — HT01BC208?
Yes. This is the factory-specified OEM transformer for the Carrier 09DE084600 — HT01BC208. 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 09DE084600 — HT01BC208?
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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