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OEM Carrier Transformer 40VA 120V/24V for C50A503562
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A503562

SKU: CARRIE-C50A503562-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A503562 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 120V to 24V for Model C50A503562

This OEM replacement transformer is the factory-specified step-down control transformer for the Carrier C50A503562 commercial packaged unit. The transformer converts 120V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When it fails, the system goes completely silent: the thermostat goes dark, no calls for heat or cool are processed, and the unit will not respond to any commands. A faulty transformer is one of the most common causes of a completely unresponsive HVAC system.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part numbers HT01BD236 and HT01BD702 | Factory-matched for Carrier C50A503562
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA and impedance specifications, preventing nuisance trips, overheating, and premature control board failures that are common with undersized aftermarket units.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output before reconnecting load). Photograph all wiring prior to removal. Replace the fuse or circuit breaker if the original transformer failed due to a short.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse stock.

Compatibility: Designed for the Carrier C50A503562 commercial rooftop/packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Verify your unit's control voltage and VA requirements on the data plate before ordering. Not sure it fits? Our parts team confirms fitment before you buy — order with confidence and get it shipped 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 $99
  • 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 C50A503562?
Yes. This is the factory-specified OEM transformer for the Carrier C50A503562. 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 C50A503562?
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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