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Carrier

OEM Carrier Transformer HT01BD253 for Model FA4ANF036000AGAA

SKU: carrier-transformer-fa4anf036000agaa 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 FA4ANF036000AGAA

This OEM Carrier transformer (part HT01BD253) is the genuine step-down transformer that powers the low-voltage control circuit of the FA4ANF036000AGAA fan coil. It converts incoming line voltage to the 24V the thermostat, control board, and relays need to operate. A failed transformer leaves the system completely dead on the control side: no thermostat display, no blower, no response to a call for cooling or heating. Frequently a transformer burns out from a shorted control wire or seized component, so inspect the circuit before installing the new one. Using the factory Carrier transformer guarantees the VA rating and primary/secondary voltages match the FA4ANF036000AGAA exactly, preventing overload and nuisance failures. Replacement is a moderate job for a qualified technician: disconnect power, label the primary and secondary leads, mount the new transformer, and reconnect. Most installs take 20-40 minutes. Orders placed before 3PM CST ship same-day so you can restore control power fast. Trust genuine Carrier components to bring the system back online reliably. Backed by OEM quality and rapid shipping.

Compatibility

This part is compatible with Carrier model FA4ANF036000AGAA.

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 FA4ANF036000AGAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4ANF036000AGAA. 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 FA4ANF036000AGAA?
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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