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OEM Carrier Transformer P291-0341 for Model FB4ANF024005AFAA

SKU: carrier-transformer-fb4anf024005afaa Brand: Carrier
$34.95

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

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OEM Carrier Transformer P291-0341 for Model FB4ANF024005AFAA

This genuine Carrier transformer (P291-0341) converts incoming line voltage to the 24V control voltage that powers the thermostat, control board, and relays in your FB4ANF024005AFAA fan coil. A failed transformer kills the entire low-voltage circuit, leaving you with a blank thermostat and a system that won't respond to a cooling call. This OEM part matches the precise VA rating and tap configuration Carrier engineered for the FB4ANF024005AFAA, delivering stable control power without nuisance trips or fuse blows. Replacement is a moderate-difficulty task best handled by an HVAC tech: shut off power, label and transfer the primary and secondary leads, and mount the new transformer — usually 30 to 45 minutes. Since a blown control-board fuse frequently accompanies transformer failure, inspect and replace it during the swap. Genuine OEM parts safeguard your equipment and warranty. In stock and ready to ship same-day on orders placed before 3PM CST so your system gets back up and running quickly.

Compatibility

This part is compatible with Carrier model FB4ANF024005AFAA.

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 FB4ANF024005AFAA?
Yes. This is the factory-specified OEM transformer for the Carrier Model FB4ANF024005AFAA. 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 FB4ANF024005AFAA?
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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