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OEM Carrier Transformer 40VA 230V/115V for Model 09DE064C600
Carrier

OEM Carrier Transformer 40VA 230V/115V for Model 09DE064C600

SKU: CARRIE-09DE064C600-TRANSFORMER-HT01BC208 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 230V/115V for Model 09DE064C600

This OEM Carrier control transformer (part# HT01BC208) is the factory-specified replacement for the Carrier 09DE064C600. The transformer steps down high-voltage supply power to the low-voltage control circuit that powers your thermostat, control board, and all 24V system signals. When this transformer fails, the entire control circuit goes dead — the system will not respond to the thermostat, and nothing will turn on. A shorted transformer will also frequently blow the low-voltage fuse on the control board.

  • Specs: 40VA rating | 230V primary input | 115V secondary output | 50/60 Hz | OEM part number HT01BC208 | Cross-references: 320659-301, 2-05757-1
  • OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Aftermarket units often underperform at rated VA load, causing nuisance lockouts and premature control board damage.
  • Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify input and output voltages with a meter after installation before restoring power to the full system.
  • Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Fits Carrier model 09DE064C600. Verify your existing transformer's VA rating, primary voltage (230V), and secondary voltage (115V) from your unit's data plate before ordering. This part also crosses to Bryant and Payne units using the same specification. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy.

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 Model 09DE064C600?
Yes. This is the factory-specified OEM transformer for the Carrier Model 09DE064C600. 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 Model 09DE064C600?
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
HVAC Parts Specialist — Online