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OEM Carrier Transformer 40VA 120V/24V for C50A303052
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A303052

SKU: CARRIE-C50A303052-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A303052 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD236 for Model C50A303052

This OEM control transformer (part number HT01BD236) is the factory-specified replacement for the Carrier C50A303052 commercial packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, contactor coil, and every low-voltage safety circuit in the system. When it fails, absolutely nothing works — the thermostat goes blank, the unit won't respond to any call for heating or cooling, and you may find a blown fuse on the control board. It is often the first component to check when an entire system goes dark.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Factory-matched OEM replacement | Foot-mount bracket included
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA and thermal specifications. Undersized or off-tolerance generic units can overheat and blow repeatedly — especially on commercial packaged equipment with multiple 24V loads on the same circuit.
  • Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 0V before touching terminals). Always cap and label wires before removing the old transformer, and verify 24V output before closing the panel.
  • Warranty: 1-year OEM factory warranty. In-stock units ship the same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier C50A303052 commercial rooftop/packaged unit. Cross-reference your existing transformer's VA rating and primary/secondary voltages from the unit data plate before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you buy — 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 C50A303052?
Yes. This is the factory-specified OEM transformer for the Carrier C50A303052. 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 C50A303052?
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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