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 FV4ANF002000ACAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for FV4ANF002000ACAA

SKU: CARRIE-FV4ANF002000ACAA-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 FV4ANF002000ACAA

This OEM control transformer (part# HT01CN236) is the factory-specified replacement for the Carrier FV4ANF002000ACAA fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, nothing works: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and the control board receives no power. A failed transformer is often misdiagnosed as a bad control board or thermostat, so always verify 24V output at the secondary terminals before replacing other components.

  • Specs: 40VA rating | 120V primary / 24V secondary | Class 2 output | OEM part number HT01CN236 | Factory-matched to FV4ANF002000ACAA wiring harness
  • OEM vs Generic: The OEM HT01CN236 transformer is wound to exact VA and voltage tolerances required by the Carrier control board. Generic transformers with loose VA ratings can sag under load, causing nuisance lockouts, erratic thermostat behavior, and premature contactor wear.
  • Install Difficulty: 2/5 — Disconnect power at the breaker and verify voltage is off with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label and photograph all low-voltage wiring before disconnecting. Installation typically takes 20–30 minutes for an experienced DIYer.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FV4ANF002000ACAA fan coil air handler. Confirm your unit's data plate lists 120V/24V 40VA transformer requirements before ordering. If you're unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork required.

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 FV4ANF002000ACAA?
Yes. This is the factory-specified OEM transformer for the Carrier FV4ANF002000ACAA. 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 FV4ANF002000ACAA?
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