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OEM Carrier Transformer 460V→24V 75VA for TCHC2550HECMRAP602
Carrier

OEM Carrier Transformer 460V→24V 75VA for TCHC2550HECMRAP602

SKU: CARRIE-TCHC2550HECMRAP602-TRANSFORMER-HT01BD702 Brand: Carrier
✓ Guaranteed to fit TCHC2550HECMRAP602 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 460V / 24V 75VA — HT01BD702 for Model TCHC2550HECMRAP602

This is the genuine OEM Carrier replacement transformer (part number HT01BD702) factory-specified for the Carrier TCHC2550HECMRAP602 unit. The transformer steps down the 460V line voltage to 24V AC to power the low-voltage control circuit — thermostats, safety switches, relays, and the control board all depend on this component. When the transformer fails, the entire control circuit goes dark: the system will not respond to thermostat calls, contactors won't energize, and the unit appears completely dead despite line power being present.

  • Specs: Primary Voltage: 460V AC | Secondary Voltage: 24V AC | Power Rating: 75 VA | Factory OEM part number HT01BD702 | Durable steel core with copper windings
  • OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic aftermarket transformers often deviate in secondary voltage output, risking nuisance trips, control board damage, or premature contactor failure.
  • Install Difficulty: 3/5 — Work involves 460V primary wiring; always de-energize and lock out the unit before servicing. Tools needed: multimeter (verify 0V before touching terminals), wire strippers, screwdriver set, and wire nuts. Photograph all wiring before disconnecting. Professional installation strongly recommended for 460V systems.
  • Warranty & Shipping: Backed by a 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Verified direct OEM replacement for Carrier model TCHC2550HECMRAP602. Confirm primary supply voltage on the unit's data plate is 460V before ordering. Not for use on 208V or 230V primary applications unless otherwise specified. Our fitment team is available to verify compatibility before you purchase — contact us with your unit's full model and serial number.

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 TCHC2550HECMRAP602?
Yes. This is the factory-specified OEM transformer for the Carrier TCHC2550HECMRAP602. 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 TCHC2550HECMRAP602?
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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