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OEM Carrier Transformer 40VA 120V-24V for FA4ANC030005AGAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for FA4ANC030005AGAA

SKU: CARRIE-FA4ANC030005AGAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model FA4ANC030005AGAA Air Handler

This OEM Carrier control transformer (part# HT01CN236) is the factory-specified replacement for the FA4ANC030005AGAA air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage components. When this part fails, the entire control circuit goes dark — nothing responds, the thermostat goes blank, and the system will not heat, cool, or run the fan under any call.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM construction | Spade or screw terminal connections
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA and thermal specifications. Undersized or off-brand units can overheat under demand loads, trip thermal protection, or cause erratic low-voltage behavior that mimics control board failures.
  • Install difficulty: 2/5 — Always shut off line-voltage power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring before disconnecting terminals.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier FA4ANC030005AGAA residential air handler. Verify existing transformer VA rating and terminal configuration on your unit's data plate or wiring diagram before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your system back online fast.

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 FA4ANC030005AGAA?
Yes. This is the factory-specified OEM transformer for the Carrier FA4ANC030005AGAA. 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 FA4ANC030005AGAA?
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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