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OEM Carrier Transformer 40VA 120V/24V for HGRH50HJ441645
Carrier

OEM Carrier Transformer 40VA 120V/24V for HGRH50HJ441645

SKU: CARRIE-HGRH50HJ441645-TRANSFORMER-HT01BD242 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 120V/24V for Model HGRH50HJ441645

This is the factory OEM replacement transformer (part number HT01BD242) for the Carrier HGRH50HJ441645 HVAC system. The transformer steps down line voltage from 120V AC to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and no fault codes will display because the board itself has lost power.

  • Specs: Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD242 | Factory-matched to Carrier HGRH50HJ441645 control circuit requirements
  • OEM vs Generic: This OEM transformer is wound and rated to exact Carrier factory specifications. Generic replacements may carry insufficient VA ratings, causing premature failure under full control-circuit load — especially in multi-stage or communicating systems.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning any work. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminals. Verify 120V input and 24V output with a multimeter after installation before closing the panel.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier HGRH50HJ441645. Always verify your unit's existing transformer VA rating and voltage on the data plate or wiring diagram before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you order — call or chat today and get this part shipped to your door 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 HGRH50HJ441645?
Yes. This is the factory-specified OEM transformer for the Carrier HGRH50HJ441645. 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 HGRH50HJ441645?
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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