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OEM Carrier Transformer 40VA 120V-24V for CH13NA02500GAAAA
Carrier

OEM Carrier Transformer 40VA 120V-24V for CH13NA02500GAAAA

SKU: CARRIE-CH13NA02500GAAAA-TRANSFORMER-HT01AW229 Brand: Carrier
✓ Guaranteed to fit CH13NA02500GAAAA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V-24V for Model CH13NA02500GAAAA

This OEM control transformer (part number HT01AW229) is the factory-specified replacement for the Carrier CH13NA02500GAAAA split-system air conditioner. 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 — your thermostat goes blank, the system won't respond to any call for cooling or heating, and no safety or diagnostic functions operate. A failed transformer is often mistaken for a bad thermostat or control board, making it a smart first diagnostic step.

  • Specs: 40VA rated | 120V primary / 24V secondary | Class 2 control circuit transformer | OEM part number HT01AW229 | Factory-matched construction for Carrier CH13NA02500GAAAA
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Undersized or off-tolerance generic units can cause nuisance tripped fuses, erratic thermostat behavior, or premature contactor coil failure.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter for verification. Label and photograph all low-voltage wiring connections before removal. Confirm 24V output at secondary terminals after installation before restoring system power.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier CH13NA02500GAAAA split-system condenser. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment — call or chat before you order.

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 CH13NA02500GAAAA?
Yes. This is the factory-specified OEM transformer for the Carrier CH13NA02500GAAAA. 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 CH13NA02500GAAAA?
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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