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OEM Carrier Transformer 40VA 230/115V for Model 09DE064800
Carrier

OEM Carrier Transformer 40VA 230/115V for Model 09DE064800

SKU: CARRIE-09DE064800-TRANSFORMER-HT01BC208 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Transformer 40VA 230V/115V for Model 09DE064800

This OEM Carrier control transformer (part number HT01BC208) is the factory-specified replacement for the Carrier 09DE064800. The transformer is the backbone of your HVAC unit's control circuit — it steps down the supply voltage to power the thermostat, control board, and all 24V control components. When this transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any commands, and no heating or cooling operation can occur. A failed transformer is often identified by a burning smell, a tripped fuse on the secondary side, or a complete loss of 24V signal across the system.

  • Specs: 40VA rating | 230V primary voltage | 115V secondary voltage | Totaline OEM-branded | Factory-matched to Carrier 09DE064800 electrical specifications
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Aftermarket units can run hot, trip internal breakers prematurely, or deliver off-spec voltage that damages sensitive circuit boards and thermostats.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before replacing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring connections before removal. Verify 24V output with a multimeter after installation before closing up the unit.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for Carrier model 09DE064800. Cross-references include OEM part numbers 320659-301 and 2-05757-1. Always verify primary and secondary voltage ratings on your unit's data plate prior to ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.

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 09DE064800?
Yes. This is the factory-specified OEM transformer for the Carrier Model 09DE064800. 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 09DE064800?
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