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OEM Carrier Transformer 40VA 120V/24V for C50A602064
Carrier

OEM Carrier Transformer 40VA 120V/24V for C50A602064

SKU: CARRIE-C50A602064-TRANSFORMER-HT01BD702 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD702 for Model C50A602064

This OEM replacement transformer (part number HT01BD702) is the factory-specified control circuit transformer for the Carrier C50A602064 packaged unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including your thermostat, contactor coil, and control board. When it fails, the entire control circuit goes dead: the thermostat goes blank, the system shows no response whatsoever, and the unit will not start. It is often one of the first components to check when an HVAC system appears completely unresponsive.

  • Specs: 40VA output rating | 120V primary / 24V secondary | Factory-matched OEM part number HT01BD702 | Designed for Carrier commercial packaged unit applications
  • OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage tolerances. Undersized or off-spec generic transformers can sag under load, causing erratic control behavior, nuisance lockouts, and premature contactor coil failure.
  • Install difficulty: 2/5 — Shut off all power to the unit before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter (to confirm 24V output post-installation). Photograph all wiring connections before disconnecting the old transformer.
  • Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier C50A602064 packaged unit. Always verify primary voltage and VA rating on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment 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 C50A602064?
Yes. This is the factory-specified OEM transformer for the Carrier C50A602064. 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 C50A602064?
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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