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OEM Carrier Transformer 40VA 120V-24V for C50A306052
Carrier

OEM Carrier Transformer 40VA 120V-24V for C50A306052

SKU: CARRIE-C50A306052-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A306052 — 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 C50A306052

This OEM replacement transformer (part number HT01BD236) is the factory-specified control circuit transformer for the Carrier C50A306052 commercial packaged rooftop unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dead: the thermostat displays nothing, the system won't respond to any call for heating or cooling, and no safety circuits can operate. It is one of the first components to check when a unit shows zero control activity.

  • Specs: Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01BD236 | Factory-matched insulation class and VA capacity for continuous commercial duty
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic transformers can cause nuisance lockouts, contactor chatter, and premature control board failure — especially under full commercial load.
  • Install difficulty: 2/5 — Disconnect and lock out all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 24V output after install), and wire nuts or terminal connectors. Note primary and secondary wiring orientation before removal.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier C50A306052 commercial rooftop packaged unit. Always verify input voltage, output voltage, and VA rating on your unit's wiring diagram or data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you purchase — no guesswork required.

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 C50A306052?
Yes. This is the factory-specified OEM transformer for the Carrier C50A306052. 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 C50A306052?
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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