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OEM Carrier 40VA 120V to 24V Transformer for C4850C48ZG060600 | National HVAC Parts
Carrier

OEM Carrier 40VA 120V to 24V Transformer for C4850C48ZG060600 | National HVAC Parts

SKU: CARRIE-C4850C48ZG060600-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Control Transformer 40VA for Model C4850C48ZG060600 (HT01BD236)

This OEM replacement control transformer (part# HT01BD236) is the factory-specified unit for the Carrier C4850C48ZG060600 packaged gas/electric unit. The transformer steps down line voltage (120V) to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and all safety controls. When it fails, nothing in the system responds: the thermostat goes blank, the unit won't start, and no error codes appear because the control board itself has lost power.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Compatible with single-phase packaged unit control circuits
  • OEM vs Generic: The OEM HT01BD236 transformer meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat when multiple 24V loads (gas valve + contactor + board) draw simultaneously, causing nuisance trips or premature failure.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter to confirm 24V output after installation. Note wire color and terminal labeling before disconnecting the old unit.
  • Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse.

Compatibility: Designed for the Carrier C4850C48ZG060600 packaged unit. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — don't guess on control circuit components. Order today and get same-day shipping on in-stock parts.

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 C4850C48ZG060600 | National HVAC Parts?
Yes. This is the factory-specified OEM transformer for the Carrier C4850C48ZG060600 | National HVAC Parts. 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 C4850C48ZG060600 | National HVAC Parts?
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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