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OEM Carrier 40VA 120V to 24V Control Transformer for C48A306062 (HT01BD236) | National HVAC Parts
Carrier

OEM Carrier 40VA 120V to 24V Control Transformer for C48A306062 (HT01BD236) | National HVAC Parts

SKU: CARRIE-C48A306062-TRANSFORMER-HT01BD236 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V–24V for Model C48A306062

This OEM control transformer is the factory-specified replacement for the Carrier C48A306062 packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, the entire control circuit goes dark — the thermostat displays nothing, the system won't respond to any call for heating or cooling, and no diagnostic codes will appear because the board itself has no power.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM Part Numbers: HT01BD236 and HT01BD702 | Factory-matched impedance and thermal protection
  • OEM vs Generic: OEM transformers include factory-rated surge protection and are wound to exact VA specifications, preventing nuisance tripping and protecting downstream control boards. Generic units often under-deliver VA capacity under load, causing intermittent control failures and shortened board life.
  • Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output after install), wire stripper. Always verify primary and secondary voltage labels before connecting leads.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C48A306062 packaged unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Both OEM part numbers HT01BD236 and HT01BD702 are fulfilled with this listing — confirm your current part number matches either reference. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before your order ships.

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 C48A306062 (HT01BD236) | National HVAC Parts?
Yes. This is the factory-specified OEM transformer for the Carrier C48A306062 (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 C48A306062 (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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