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OEM Carrier Transformer 40VA 120V/24V for C50A502552
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A502552

SKU: CARRIE-C50A502552-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A502552 — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V/24V for Model C50A502552

This OEM Carrier transformer (part number HT01BD236) is the factory-specified replacement for the C50A502552 commercial packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the entire control circuit goes dead: no thermostat response, no staging, no heating or cooling — nothing works. A failed transformer is often caused by a short or overload downstream in the control circuit, so always inspect low-voltage wiring before replacing.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched output for Carrier commercial controls
  • OEM vs Generic: This OEM transformer is wound and tested to Carrier's exact VA and voltage tolerances. Generic transformers may run under-rated VA, causing premature thermal cutout trips and leaving your control circuit under-powered during peak demand.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Verify 24V output with a multimeter after installation before restoring full system power. Always check for low-voltage shorts that may have caused the original failure.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier C50A502552 commercial rooftop/packaged unit. Confirm your unit's control circuit voltage and VA requirements on the data plate before ordering. If you're unsure of fitment, our parts team verifies compatibility before your order ships — reach out today and get your system back online fast.

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 C50A502552?
Yes. This is the factory-specified OEM transformer for the Carrier C50A502552. 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 C50A502552?
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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