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Carrier

OEM Carrier Transformer HT01BD253 for Model FA4ANF036000AFAA

SKU: carrier-transformer-fa4anf036000afaa Brand: Carrier
$44.95

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

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OEM Carrier Transformer HT01BD253 for Model FA4ANF036000AFAA

This OEM Carrier transformer (part HT01BD253) is the genuine step-down transformer that supplies low-voltage control power to the FA4ANF036000AFAA fan coil. It converts incoming line voltage to the 24V required by the thermostat, control board, and relays. When the transformer fails, the control side goes completely dead: no thermostat display, no blower, and no response to a call for cooling or heating. A blown transformer often points to a shorted control wire or failed component, so check the circuit before installing the replacement. Using the factory Carrier transformer guarantees the VA rating and primary/secondary voltages match the FA4ANF036000AFAA exactly, preventing overload and repeat failures. Replacement is a moderate task for a qualified technician: disconnect power, label the primary and secondary leads, mount the new transformer, and reconnect the wiring. Most installs take 20-40 minutes. Orders placed before 3PM CST ship same-day so you can restore control power quickly. Trust genuine Carrier components to bring the system back online. Backed by OEM quality and rapid shipping.

Compatibility

This part is compatible with Carrier model FA4ANF036000AFAA.

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 FA4ANF036000AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4ANF036000AFAA. 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 FA4ANF036000AFAA?
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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