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OEM Carrier Transformer 40VA 120/24V for GB1AAV036111AGJA — HT01CN001
Carrier

OEM Carrier Transformer 40VA 120/24V for GB1AAV036111AGJA — HT01CN001

SKU: CARRIE-GB1AAV036111AGJA-TRANSFORMER-HT01CN001 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer for Model GB1AAV036111AGJA — Part HT01CN001

This OEM control transformer (part number HT01CN001) is the factory-specified replacement for the Carrier GB1AAV036111AGJA gas furnace. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, and ignition board. When the transformer fails, the entire control circuit goes dark: your thermostat shows no power, the system is completely unresponsive, and no heating or fan operation occurs. A failed transformer is often caused by a shorted control wire, a stuck contactor coil, or age-related winding breakdown.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01CN001 | Direct plug-and-play fit for GB1AAV036111AGJA
  • OEM vs Generic: OEM transformers from Carrier are wound to exact VA and voltage tolerances, ensuring reliable 24V output under full load. Generic units frequently produce undervoltage at full circuit load, causing intermittent lockouts and nuisance tripping of the furnace control board.
  • Install Difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all low-voltage wiring before disconnecting. Always inspect all 24V wiring for shorts before installing the new transformer — a wiring short will destroy the new unit immediately.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before 3PM ship same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier GB1AAV036111AGJA gas furnace. Verify OEM part number HT01CN001 on your existing transformer label or equipment data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before your order is placed — ensuring a correct first-time repair.

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 GB1AAV036111AGJA — HT01CN001?
Yes. This is the factory-specified OEM transformer for the Carrier GB1AAV036111AGJA — HT01CN001. 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 GB1AAV036111AGJA — HT01CN001?
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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