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OEM Carrier Transformer 40VA 120V/24V for CH13NA04900GABAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for CH13NA04900GABAA

SKU: CARRIE-CH13NA04900GABAA-TRANSFORMER-HT01AW229 Brand: Carrier
✓ Guaranteed to fit CH13NA04900GABAA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA for Model CH13NA04900GABAA

This OEM control transformer (part# HT01AW229) is the factory-specified replacement for the Carrier CH13NA04900GABAA split-system condenser. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, nothing responds, and the system will not heat or cool at all. A blown transformer is often caused by a shorted wire or failed component downstream, so always inspect the control circuit before installing a replacement.

  • Specs: 40VA rating | 120V primary / 24V secondary | Factory-matched OEM construction | Screw or quick-connect terminals | Meets UL Class 2 output requirements
  • OEM vs Generic: The OEM HT01AW229 transformer is wound and rated to Carrier's exact VA specification, ensuring the 24V control circuit maintains stable voltage under full load. Generic transformers rated at lower VA can sag under load, causing erratic contactor chattering and nuisance lockouts.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after installation). Photograph all wiring connections before removing the old transformer.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier CH13NA04900GABAA split-system units. Cross-reference OEM part number HT01AW229 and verify your existing transformer's VA rating and terminal configuration on the unit data plate before ordering. Our fitment team is available to 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 CH13NA04900GABAA?
Yes. This is the factory-specified OEM transformer for the Carrier CH13NA04900GABAA. 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 CH13NA04900GABAA?
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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Mike Rivera
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