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OEM Carrier Transformer 40VA 230V for Model 09DE084910 — HT01BC208
Carrier

OEM Carrier Transformer 40VA 230V for Model 09DE084910 — HT01BC208

SKU: CARRIE-09DE084910-TRANSFORMER-HT01BC208 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BC208 for Model 09DE084910

This is the factory-original OEM control transformer for the Carrier model 09DE084910, sold under part number HT01BC208. The transformer steps down line voltage to power the 24V control circuit that drives your thermostat, contactor coil, gas valve, and every other low-voltage component in the system. When it fails, the entire control circuit goes dead — your thermostat goes blank, your system won't respond to any call for heat or cooling, and you may blow a low-voltage fuse repeatedly.

  • Specs: 40VA rating | 230V primary voltage | 115V secondary voltage | OEM-matched mounting footprint | Cross-references: 320659-301, 2-05757-1
  • OEM vs Generic: This genuine Carrier OEM transformer is wound to exact factory tolerances, ensuring consistent 24V output under full load. Aftermarket units often run slightly high or low voltage, stressing relay coils and shortening board life.
  • Install difficulty: 2/5 — Turn off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring connections before disconnecting. Verify output voltage with a multimeter after installation before powering the full system.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model 09DE084910. Always verify the part number on your existing transformer's label and confirm primary/secondary voltage ratings match your unit's data plate before ordering. Our team is available to verify fitment — contact us before you order if you have any questions.

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 09DE084910 — HT01BC208?
Yes. This is the factory-specified OEM transformer for the Carrier Model 09DE084910 — 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 Model 09DE084910 — 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
HVAC Parts Specialist — Online