Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Transformer 40VA 120V-24V for FA4ANF018010AGAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FA4ANF018010AGAA

SKU: CARRIE-FA4ANF018010AGAA-TRANSFORMER-HT01CN236 Brand: Carrier
✓ Guaranteed to fit FA4ANF018010AGAA — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 40VA 120V/24V for Model FA4ANF018010AGAA

This is the factory OEM replacement transformer (part number HT01CN236) for the Carrier FA4ANF018010AGAA fan coil air handler. The transformer steps down line voltage (120V) to the 24V control circuit voltage that powers your thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead — the thermostat display may go blank, the system won't respond to any calls for heating or cooling, and in some cases a blown fuse on the control board is the first sign the transformer has shorted. Replacing this OEM-matched transformer restores full system operation quickly and reliably.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01CN236 | Factory-matched output for Carrier control circuits
  • OEM vs Generic: This OEM unit is wound to Carrier's exact VA and voltage tolerance specifications. Generic transformers may underperform under load, causing intermittent lockouts, nuisance tripped fuses, or premature control board failure due to voltage fluctuation.
  • Install difficulty: 2/5 — Shut off power at the breaker and disconnect switch before beginning. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. Total job time: 20–30 minutes for most technicians.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FA4ANF018010AGAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or old component label before ordering. If you're unsure of fitment, our HVAC parts team can confirm compatibility before you buy — same-day shipping available on all in-stock orders.

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 $99
  • 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 info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier FA4ANF018010AGAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANF018010AGAA. 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 FA4ANF018010AGAA?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online