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 FE4ANF005L00ABAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FE4ANF005L00ABAA

SKU: CARRIE-FE4ANF005L00ABAA-TRANSFORMER-HT01CN236 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model FE4ANF005L00ABAA

This OEM control transformer (part number HT01CN236) is the factory-specified replacement for the Carrier FE4ANF005L00ABAA fan coil air handler. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, control board, and relay coils. When the transformer fails, the entire control circuit goes dead: your thermostat goes blank, the system refuses to respond to any calls for heating or cooling, and nothing happens at all. It is one of the most overlooked — and easiest — fixes in residential HVAC service.

  • Specs: 40VA output rating | 120V primary / 24V secondary | OEM part number HT01CN236 | Factory-matched to Carrier FE4ANF005L00ABAA wiring harness and control circuit demand
  • OEM vs Generic: OEM transformers are wound and rated to exact factory VA specifications, ensuring stable 24V output under full control-circuit load. Generic units often run undersized VA ratings, causing voltage sag that trips boards and contactors prematurely.
  • Install difficulty: 2/5 — Turn off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Photograph all wiring connections before removal. Primary wires connect to 120V supply leads; secondary wires connect to R and C on the control board.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed and factory-specified for the Carrier FE4ANF005L00ABAA fan coil air handler. Confirm your unit's data plate shows a 40VA, 120V/24V transformer requirement before ordering. If you're unsure of fitment, our HVAC parts specialists are available to verify compatibility before your order is placed — so you get the right part the first time.

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

Frequently Asked Questions

Does this Transformer fit my Carrier FE4ANF005L00ABAA?
Yes. This is the factory-specified OEM transformer for the Carrier FE4ANF005L00ABAA. 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 FE4ANF005L00ABAA?
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