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OEM Carrier 40VA 120V to 24V Control Transformer for C48A304062 — Ships Today
Carrier

OEM Carrier 40VA 120V to 24V Control Transformer for C48A304062 — Ships Today

SKU: CARRIE-C48A304062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V Control Circuit for Model C48A304062

This OEM control circuit transformer is the factory-specified replacement for the Carrier C48A304062 packaged unit. The transformer steps down line voltage (120V) to the 24V AC signal required to power the thermostat, control board, contactor coil, and all low-voltage control components. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system produces no response to any call for heating or cooling, and fuses or breakers may trip repeatedly. Replacing a failed transformer with the correct OEM part restores proper voltage regulation and protects the downstream electronics it supplies.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM Part Numbers: HT01BD236 / HT01BD702 | Factory-matched output tolerance for stable control circuit operation
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications for the Carrier C48A304062. Generic substitutes may deliver unsteady 24V output, causing nuisance lockouts, contactor chatter, or premature control board failure.
  • Install difficulty: 2/5 — Shut off all power to the unit before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or terminal connectors, multimeter to verify 24V output after installation. Label or photograph all wiring connections before disconnecting the old transformer.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed by 3 PM ship same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier C48A304062 packaged unit. Cross-reference OEM part numbers HT01BD236 and HT01BD702 against your unit's data plate and wiring diagram to confirm fitment before ordering. If you have questions about compatibility, our HVAC parts specialists verify fitment at no charge — contact us before you order.

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 C48A304062 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C48A304062 — 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 C48A304062 — 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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