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OEM Carrier Transformer 40VA 120V/24V for C50A504061
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A504061

SKU: CARRIE-C50A504061-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A504061 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD236 for Model C50A504061

This OEM replacement transformer (part number HT01BD236) is the factory-specified control transformer for the Carrier C50A504061 commercial rooftop unit. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage control circuit in the system. When this component fails, the entire control circuit goes dead — nothing responds, the thermostat goes blank, and the unit will not start under any call for heating or cooling.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 control circuit transformer | Direct OEM replacement for part number HT01BD236
  • OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact VA and voltage tolerances. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs, or fail to sustain voltage under full control-circuit load — leaving you with an intermittent fault that is difficult to diagnose.
  • Install difficulty: 2/5 — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all wiring connections before disconnecting the old unit.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C50A504061 commercial packaged rooftop unit. Always verify primary voltage and VA rating on your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase. Order today and receive same-day shipping on all in-stock OEM parts.

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 C50A504061?
Yes. This is the factory-specified OEM transformer for the Carrier C50A504061. 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 C50A504061?
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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