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OEM Carrier Transformer 40VA 120V/24V for C50A406062
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A406062

SKU: CARRIE-C50A406062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V to 24V for Model C50A406062

This OEM control transformer is the factory-specified replacement for the Carrier C50A406062 commercial rooftop unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactors, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses any call for heating or cooling, and no relays or contactors will energize. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rating | 120V primary / 24V secondary | Industry-standard foot-mount bracket | Class 2 transformer rated for HVAC control circuits
  • OEM vs Generic: This factory OEM transformer is wound to exact VA and voltage tolerances for the C50A406062 control board. Undersized or off-tolerance generic transformers can sag under load, causing nuisance lockouts, chattering contactors, and premature control board failure.
  • Install difficulty: 2/5 — Shut off all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output before reconnecting control wiring. Always photograph existing wiring before removal.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C50A406062 commercial packaged rooftop unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or wiring diagram before ordering. OEM part numbers HT01BD236 and HT01BD702 are direct cross-references for this listing. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — call or chat today.

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 C50A406062?
Yes. This is the factory-specified OEM transformer for the Carrier C50A406062. 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 C50A406062?
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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