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OEM Carrier Transformer 460V Pri 24V Sec 75VA — TCHC1150HEFMRADCR601
Carrier

OEM Carrier Transformer 460V Pri 24V Sec 75VA — TCHC1150HEFMRADCR601

SKU: CARRIE-TCHC1150HEFMRADCR601-TRANSFORMER-HT01BD702 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer 460V Primary / 24V Secondary 75VA for Model TCHC1150HEFMRADCR601

This is the genuine OEM Carrier control transformer (part number HT01BD702), the factory-specified replacement for the Carrier TCHC1150HEFMRADCR601 commercial HVAC unit. The transformer steps down the 460V line voltage to the 24V signal used by your thermostat, control board, contactors, and safety circuits. When this component fails, the entire low-voltage control circuit goes dead — the system will not respond to thermostat calls, contactors won't energize, and diagnostic LEDs may go dark entirely.

  • Specs: 460V AC primary voltage | 24V secondary voltage | 75VA capacity | Compact steel-core housing | Copper windings for maximum thermal efficiency and longevity
  • OEM vs Generic: This is a genuine Carrier OEM part with factory-matched VA rating and insulation class. Generic transformers frequently ship with undersized VA ratings or looser voltage tolerances, which can starve sensitive control boards of clean 24V power and cause intermittent faults or premature board failure.
  • Install difficulty: 3/5 — This unit operates at 460V; always disconnect and lock out power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and appropriate wire connectors. Photograph all wiring connections before removal. Due to the high-voltage primary side, installation by a licensed HVAC technician or electrician is strongly recommended.
  • Warranty: 1-year OEM factory warranty against defects. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: Designed as a direct OEM replacement for the Carrier TCHC1150HEFMRADCR601 commercial rooftop/applied HVAC system. Always verify your unit's voltage rating and VA requirement on the equipment data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — call or chat today and we'll get you the right part, fast.

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 OEM Carrier Transformer 460V Pri 24V Sec 75VA — TCHC1150HEFMRADCR601?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Transformer 460V Pri 24V Sec 75VA — TCHC1150HEFMRADCR601. 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 OEM Carrier Transformer 460V Pri 24V Sec 75VA — TCHC1150HEFMRADCR601?
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