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OEM Carrier Transformer 40VA 120V/24V for C50A203562
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A203562

SKU: CARRIE-C50A203562-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A203562 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C50A203562

This OEM control transformer is the factory-specified replacement for the Carrier C50A203562 packaged unit. The transformer steps down line voltage (120V) to the 24V signal used by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, nothing responds — the thermostat goes dark, the system won't call for heating or cooling, and no fault codes are generated because the control circuit itself has lost power. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Industry-standard footprint | Factory-matched impedance and thermal protection
  • OEM vs Generic: OEM transformers from Carrier are wound to exact VA and impedance tolerances, protecting downstream control boards from voltage sag or spike. Generic units often run under-rated VA, leading to nuisance trips or premature board failure.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Verify 24V output at secondary terminals before reconnecting the control harness. Always photograph existing wiring before disconnecting.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C50A203562 commercial packaged rooftop unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Confirm your unit's control voltage requirement and VA rating on the data plate before ordering. Our parts specialists are available to verify fitment — order with confidence and get back up and running 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 C50A203562?
Yes. This is the factory-specified OEM transformer for the Carrier C50A203562. 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 C50A203562?
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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