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OEM Carrier Transformer 40VA 120V/24V for C50A505062
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A505062

SKU: CARRIE-C50A505062-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A505062 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Circuit Transformer 40VA for Model C50A505062

This OEM step-down transformer is the factory-specified replacement for the Carrier C50A505062 packaged unit. It converts 120V line voltage to the 24V signal required to power the control board, thermostat, contactor coil, and all low-voltage safety circuits. When the transformer fails, the entire control circuit goes dead — the thermostat shows no power, the unit won't respond to any call for heating or cooling, and you may detect a burning odor or see a blown fuse on the secondary side.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part numbers HT01BD236 and HT01BD702 | Factory-matched output tolerance for reliable control circuit operation
  • OEM vs Generic: OEM transformers are wound and potted to Carrier's exact VA rating and insulation class. Generic units frequently underperform under full load, causing nuisance tripping, erratic thermostat behavior, and shortened contactor coil life.
  • Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter for verifying 24V output after installation. Label all wiring connections before disconnecting the old unit.
  • Warranty: 1-year OEM factory warranty. Orders placed by 3 PM ship the same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier C50A505062 commercial packaged rooftop unit. Cross-references OEM part numbers HT01BD236 and HT01BD702 — both numbers supersede to the same component. Confirm your unit's voltage requirements on the data plate before ordering. Our fitment team is available to verify compatibility 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 $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 C50A505062?
Yes. This is the factory-specified OEM transformer for the Carrier C50A505062. 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 C50A505062?
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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