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 FY5BNF024L00AAAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FY5BNF024L00AAAA

SKU: CARRIE-FY5BNF024L00AAAA-TRANSFORMER-HT01CN241 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF024L00AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control circuit transformer for the Carrier FY5BNF024L00AAAA. It steps line voltage down from 120V to the 24V signal voltage required by the thermostat, control board, contactor coil, and all low-voltage control components. When this transformer fails, the entire control circuit goes dark — your thermostat shows no response, the system won't call for heating or cooling, and you may measure zero voltage at the secondary terminals. A blown transformer is often caused by a short in the low-voltage wiring or a failed component drawing excess current; always inspect the control circuit before installing the replacement.

  • Specs: 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01CN241 | Factory-matched for Carrier FY5BNF024L00AAAA | Class 2 transformer
  • OEM vs Generic: OEM transformers are wound and insulated to exact factory VA ratings, ensuring stable 24V output under full control circuit load. Undersized or off-brand units can sag voltage under load, causing intermittent lockouts, erratic thermostat behavior, and premature contactor coil failure.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Note wiring polarity and label all leads before disconnecting. Check low-voltage wiring for shorts before energizing.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier FY5BNF024L00AAAA. Verify your existing transformer's primary/secondary voltage ratings and VA rating on the unit data plate or wiring diagram before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before your order ships — same business day on in-stock items.

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 FY5BNF024L00AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier FY5BNF024L00AAAA. 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 FY5BNF024L00AAAA?
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