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OEM Carrier 40VA 120V to 24V Control Transformer for C48A204062 (HT01BD236) | National HVAC Parts
Carrier

OEM Carrier 40VA 120V to 24V Control Transformer for C48A204062 (HT01BD236) | National HVAC Parts

SKU: CARRIE-C48A204062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer for Model C48A204062

This OEM control transformer is the factory-specified replacement for the Carrier C48A204062 packaged unit. The transformer steps down line voltage (120V) to 24V AC to power the control board, thermostat, contactor coil, and all low-voltage safety circuits. When it fails, the result is total loss of thermostat response, a blank display, or a tripped fuse — the system appears completely dead even though line voltage is present. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched impedance and thermal protection | Replaces HT01BD236 / HT01BD702
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact thermal specifications, reducing the risk of nuisance fuse trips and premature burnout caused by undersized VA ratings common in generic replacements.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always verify 24V output at secondary terminals after installation before restoring system power.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Fits Carrier model C48A204062 packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Verify your unit's control voltage and VA rating on the data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — fast shipping means your system is back online without delay.

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 C48A204062 (HT01BD236) | National HVAC Parts?
Yes. This is the factory-specified OEM transformer for the Carrier C48A204062 (HT01BD236) | National HVAC Parts. 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 C48A204062 (HT01BD236) | National HVAC Parts?
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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