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OEM Carrier Transformer 40VA 120V/24V for C50A305061
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A305061

SKU: CARRIE-C50A305061-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C50A305061 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C50A305061

This OEM replacement control transformer (part# HT01BD236) is the factory-specified unit for the Carrier C50A305061 commercial packaged system. The transformer steps down 120V line voltage to the 24V signal required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no fault codes are generated because the board itself has lost power. If your system appears completely unresponsive and you've ruled out a tripped breaker, a failed transformer is the most likely culprit.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Factory-matched OEM design | Mounts directly to original bracket without modification
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier control boards. Undersized or off-tolerance generic units can cause nuisance tripping, control board brownouts, and premature contactor coil failure.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 0V at primary leads before touching any wiring. Label all low-voltage connections before removal.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier C50A305061 commercial packaged unit. Verify primary voltage (120V) and VA rating on your existing transformer's label before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — reach out before placing your order.

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 C50A305061?
Yes. This is the factory-specified OEM transformer for the Carrier C50A305061. 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 C50A305061?
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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