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OEM Carrier Transformer 40VA 120V/24V for C50A503062
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A503062

SKU: CARRIE-C50A503062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C50A503062

This OEM control transformer is the factory-specified replacement for the Carrier C50A503062 packaged unit. The transformer steps down line voltage (120V) to the 24V control circuit voltage that powers your thermostat, contactor coil, gas valve, and all low-voltage safety controls. When this component fails, the entire control circuit goes dead — the thermostat display may go blank, the system won't respond to calls for heating or cooling, and no relays or valves will actuate. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Designed for Carrier commercial packaged unit control circuits | Direct OEM replacement, factory-matched dimensions and terminal configuration
  • OEM vs Generic: OEM transformers from Carrier are wound to exact VA and voltage tolerances, protecting sensitive control boards and gas valves from voltage fluctuations. Generic alternatives may run outside tolerance, causing nuisance lockouts or premature board failure.
  • Install Difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter to verify output voltage after installation. Label or photograph all wiring before disconnecting the old transformer.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier C50A503062 commercial rooftop/packaged unit. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime. In stock and ships 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 C50A503062?
Yes. This is the factory-specified OEM transformer for the Carrier C50A503062. 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 C50A503062?
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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