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 C50A504062
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A504062

SKU: CARRIE-C50A504062-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 40VA Control Transformer for Model C50A504062

This OEM replacement transformer is the factory-specified 120V-to-24V step-down transformer for the Carrier C50A504062 commercial packaged unit. The transformer powers your system's entire 24V control circuit — including the thermostat, contactor coil, and control board. When it fails, nothing works: no call for heating or cooling will be answered, and the system will appear completely unresponsive. A blown transformer is often traceable to a short in the control wiring or a failed secondary component drawing excess current — always inspect the circuit before installing a replacement. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 control circuit transformer | Compact footprint for panel-mount installation
  • OEM vs Generic: This OEM transformer is wound to Carrier's exact VA and voltage specifications, ensuring stable 24V output under full load. Generic transformers frequently under-deliver VA capacity, causing nuisance lockouts and premature failure of downstream control components.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Inspect all 24V control wiring for shorts before energizing the new transformer to avoid immediate repeat failure.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C50A504062 commercial rooftop/packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Verify your unit's control voltage and VA requirements on the data plate before ordering. Our fitment specialists are available to confirm 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 $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 C50A504062?
Yes. This is the factory-specified OEM transformer for the Carrier C50A504062. 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 C50A504062?
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