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OEM Carrier Transformer 460V/24V 75VA for TCHC2550HECMRAY602
Carrier

OEM Carrier Transformer 460V/24V 75VA for TCHC2550HECMRAY602

SKU: CARRIE-TCHC2550HECMRAY602-TRANSFORMER-HT01BD702 Brand: Carrier
✓ Guaranteed to fit TCHC2550HECMRAY602 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Control Transformer 460V/24V 75VA for Model TCHC2550HECMRAY602

This genuine OEM Carrier transformer (part #HT01BD702) is the factory-specified replacement for the Carrier TCHC2550HECMRAY602 commercial HVAC system. The transformer steps down the 460V primary supply voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coils, and safety switches. When this transformer fails, the entire control circuit goes dark: the system will not respond to thermostat calls, safety shutdowns cannot operate, and the unit will appear completely dead despite line voltage being present at the disconnect.

  • Specs: 460V AC Primary | 24V AC Secondary | 75VA Rated | Steel core with copper windings | Compact footprint: approx. 4.3" × 3.25" × 3.5"
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part. OEM transformers are wound and rated to exact VA tolerances, preventing nuisance tripped breakers and control board damage that undersized generic units can cause on commercial equipment.
  • Install Difficulty: 3/5 — This unit operates on 460V primary voltage. All power must be locked out and tagged before servicing. Tools required: multimeter, screwdrivers, wire strippers, and proper PPE. Installation by a licensed HVAC/R technician is strongly recommended.
  • Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier TCHC2550HECMRAY602 commercial system. Verify your unit's primary voltage (460V), secondary voltage (24V), and minimum VA load before ordering. If you have questions about fitment, our technical team confirms compatibility before you purchase — just reach out. Order now and get same-day shipping on this hard-to-find commercial transformer.

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 TCHC2550HECMRAY602?
Yes. This is the factory-specified OEM transformer for the Carrier TCHC2550HECMRAY602. 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 TCHC2550HECMRAY602?
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
HVAC Parts Specialist — Online