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OEM Carrier Transformer 40VA 120V/24V for C50A203062
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A203062

SKU: CARRIE-C50A203062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 120V/24V for Model C50A203062

This OEM control transformer is the factory-specified replacement for the Carrier C50A203062 commercial rooftop unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coils, gas valve, and control board. When it fails, the entire low-voltage control circuit goes dead — the thermostat display may go blank, the system won't respond to calls for heating or cooling, and no fault codes will appear because the board itself has no power. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Replaces OEM part numbers HT01BD236 and HT01BD702 | Factory-matched impedance and VA rating
  • OEM vs Generic: This OEM transformer meets Carrier's exact VA and winding specifications. Undersized or off-tolerance generic transformers can overheat, trip the internal fuse, or fail to hold voltage under full control circuit load — causing intermittent lockouts.
  • Install difficulty: 2/5 — Disconnect power at the disconnect box before starting. Tools needed: flathead and Phillips screwdriver, multimeter, wire stripper. Note wire colors and terminal positions before disconnecting the old unit. Verify 24V output with a multimeter before reassembling the panel.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C50A203062 commercial rooftop packaged unit. Verify your unit's control transformer VA rating and primary voltage on the equipment data plate before ordering. Our parts specialists are available to confirm fitment — call or chat 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 C50A203062?
Yes. This is the factory-specified OEM transformer for the Carrier C50A203062. 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 C50A203062?
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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