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OEM Carrier Transformer 40VA 120V to 24V for C48A203062 — Ships Today
Carrier

OEM Carrier Transformer 40VA 120V to 24V for C48A203062 — Ships Today

SKU: CARRIE-C48A203062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C48A203062

This OEM control transformer is the factory-specified replacement for the Carrier C48A203062 packaged unit. The transformer steps down line voltage (120V) to 24V AC to power the control circuit — including the thermostat, contactor coil, and all safety switches. When it fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing works. It's often the first component to diagnose when a unit is completely unresponsive.

  • Specs: 40VA rated | 120V primary / 24V secondary | OEM part numbers HT01BD236 and HT01BD702 | Factory-matched output voltage and VA capacity for the C48A203062 control circuit
  • OEM vs Generic: OEM transformers are wound and rated to exact factory specifications, ensuring stable 24V output under full control circuit load. Generic units may sag under load, causing intermittent lockouts, nuisance trips, or premature contactor coil failure.
  • Install difficulty: 2/5 — Shut off all power to the unit before starting. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before disconnecting. Confirm primary voltage with a multimeter prior to installation.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C48A203062 packaged unit. Verify your existing transformer's primary voltage, secondary voltage, and VA rating on the unit data plate or old part label before ordering. Compatible with both OEM part numbers HT01BD236 and HT01BD702. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you order — reach out before you buy.

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 C48A203062 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C48A203062 — Ships Today. 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 C48A203062 — Ships Today?
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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