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OEM Carrier Transformer 40VA 120V/24V for CH13NA01800GAAAA
Carrier

OEM Carrier Transformer 40VA 120V/24V for CH13NA01800GAAAA

SKU: CARRIE-CH13NA01800GAAAA-TRANSFORMER-HT01AW229 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V/24V for Model CH13NA01800GAAAA

This OEM replacement transformer (part# HT01AW229) is the factory-specified control circuit transformer for the Carrier CH13NA01800GAAAA split-system condenser. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and safety switches. When the transformer fails, the entire control system goes dark: the thermostat loses power, the contactor won't energize, and the system refuses to start. If you're measuring 0V at the R and C terminals on your control board with confirmed 120V line power present, a failed transformer is the most likely culprit.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01AW229 | Direct factory replacement with correct mounting footprint and lead length
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier control boards. Undersized or off-tolerance generic transformers can overload, trip thermal cutoffs, and damage downstream components including the control board itself.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wire connections before removing the old transformer. Confirm 24V output at secondary leads before reassembling the panel.
  • Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier CH13NA01800GAAAA split-system condenser. Always verify the VA rating and primary/secondary voltages on your existing transformer's label before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — 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 CH13NA01800GAAAA?
Yes. This is the factory-specified OEM transformer for the Carrier CH13NA01800GAAAA. 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 CH13NA01800GAAAA?
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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