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OEM Carrier Transformer EF18 24V for Model FA4ANF048000AFAA

SKU: carrier-transformer-fa4anf048000afaa Brand: Carrier
$54.95

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

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OEM Carrier Transformer EF18 24V for Model FA4ANF048000AFAA

This genuine OEM Carrier transformer steps line voltage down to the 24-volt control power that runs the thermostat, control board, and relays in your Carrier FA4ANF048000AFAA fan coil. When the transformer fails, your system loses all low-voltage control: a dead thermostat, an unresponsive board, or repeatedly blown fuses are classic symptoms. This factory-spec replacement restores stable 24V output so your equipment communicates and operates correctly. Built to the exact VA rating and mounting pattern of the original, it drops into the FA4ANF048000AFAA without rewiring or adapters, avoiding the mismatched-load problems that plague generic transformers. Installation is moderate and best left to an HVAC professional: kill power at the disconnect, label primary and secondary leads, mount the new transformer, and reconnect to matching terminals. Most installs take 20-30 minutes. Confirm primary voltage and VA against your old unit before wiring. In stock and ships same-day when ordered before 3PM CST, so your control circuit is back up fast. Our team is available to help confirm compatibility.

Compatibility

This part is compatible with Carrier model FA4ANF048000AFAA.

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 FA4ANF048000AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FA4ANF048000AFAA. 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 FA4ANF048000AFAA?
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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