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OEM Carrier Transformer HT01BD230 for Model FA4BNC036005AAAA

SKU: carrier-transformer-fa4bnc036005aaaa Brand: Carrier
$36.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Transformer HT01BD230 for Model FA4BNC036005AAAA

This genuine OEM Carrier transformer (HT01BD230) steps line voltage down to the 24V control power that runs the thermostat, relays, and control board in your FA4BNC036005AAAA fan coil unit. When the transformer fails, control power is lost completely: the thermostat goes dark, the blower won't start, and cooling stops, so a proper replacement is essential to restore operation. Built to exact Carrier primary and secondary voltage specifications, this transformer is a direct-fit unit that mounts and wires the same as the factory original. Installation is a moderate task for those comfortable with low-voltage wiring: disconnect power, photograph the existing leads, transfer each wire to its matching terminal, and secure the new transformer. A licensed HVAC technician can complete the swap in under an hour if you prefer professional installation. Backed by our genuine-parts guarantee, this transformer provides reliable, code-compliant control voltage for dependable performance. In stock and ships same-day on orders placed before 3PM CST, getting your Carrier air handler back online quickly.

Compatibility

This part is compatible with Carrier model FA4BNC036005AAAA.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier Model FA4BNC036005AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4BNC036005AAAA. 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 FA4BNC036005AAAA?
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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