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OEM Carrier Transformer 40VA 120V/24V for C50A202762
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A202762

SKU: CARRIE-C50A202762-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C50A202762

This OEM control transformer is the factory-specified replacement for the Carrier C50A202762 packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, contactor coils, and all low-voltage control circuits. When this component fails, the entire control system goes dark — the thermostat loses power, the unit won't respond to calls for heating or cooling, and nothing operates. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched windings for precise voltage regulation and long service life
  • OEM vs Generic: OEM transformers are wound to exact factory VA and voltage specifications. Undersized or off-tolerance generic transformers can overload under peak demand, tripping the internal fuse and leaving your system dead again within months.
  • Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output after install), wire nuts or terminal connector. Label all low-voltage wires before disconnecting to avoid miswiring the control circuit.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse stock.

Compatibility: Designed for the Carrier C50A202762 commercial packaged rooftop unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or existing component label before ordering. Supersedes part numbers HT01BD236 and HT01BD702. Our fitment team is available to confirm compatibility before you order — same-day shipping on all in-stock parts.

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 C50A202762?
Yes. This is the factory-specified OEM transformer for the Carrier C50A202762. 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 C50A202762?
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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