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OEM Carrier Transformer 40VA 120V/24V for C50A403062
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A403062

SKU: CARRIE-C50A403062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C50A403062

This OEM replacement transformer is the factory-specified control circuit transformer for the Carrier C50A403062 packaged unit. The transformer steps down line voltage (120V) to the 24V AC signal required to power thermostats, contactors, control boards, and safety switches throughout the unit. When the transformer fails, the entire control circuit loses power — resulting in a completely unresponsive system with no heating, cooling, or fan operation.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part numbers HT01BD236 and HT01BD702 | Factory-matched output tolerance for stable control voltage
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications for the C50A403062 control circuit. Undersized or off-tolerance generic units can cause nuisance tripping, erratic thermostat behavior, or premature control board failure.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify 24V output with a multimeter after installation before closing the unit. Always check for shorted control wiring that may have caused the original transformer failure.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse in original factory packaging.

Compatibility: Designed for the Carrier C50A403062 commercial packaged rooftop unit. Cross-references OEM part numbers HT01BD236 and HT01BD702 — both are valid replacements for this model. Confirm your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Need fitment verification? Our HVAC parts specialists confirm compatibility before your order ships.

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 C50A403062?
Yes. This is the factory-specified OEM transformer for the Carrier C50A403062. 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 C50A403062?
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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