Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Transformer 40VA 120V/24V for C50A205052
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A205052

SKU: CARRIE-C50A205052-TRANSFORMER-HT01BD236 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model C50A205052

This OEM control transformer (part number HT01BD236) is the factory-specified replacement for the Carrier C50A205052 commercial rooftop unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coils, gas valve, and control board. When this component fails, the entire control circuit goes dead — your system will appear completely unresponsive, with no thermostat communication and no call-for-heat or call-for-cooling response whatsoever.

  • Specs: 40VA rating | 120V primary input | 24V secondary output | Factory-matched OEM replacement | Part number HT01BD236
  • OEM vs Generic: This OEM Carrier transformer is wound to exact factory VA and voltage specifications. Generic units may be under-rated in VA, causing overheating under full control circuit load — leading to nuisance tripping or premature failure of downstream components like the control board.
  • Install difficulty: 2/5 — Shut off all power to the unit at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire nuts or spade terminals. Label all wiring before disconnecting the original transformer.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships the same business day from our warehouse.

Compatibility: Designed for the Carrier C50A205052 commercial rooftop packaged unit. Verify your existing transformer's VA rating and primary/secondary voltage from the data plate before ordering to ensure an exact match. Our HVAC parts specialists are available to confirm fitment before you buy — order with confidence 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 $75
  • 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 C50A205052?
Yes. This is the factory-specified OEM transformer for the Carrier C50A205052. 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 C50A205052?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online