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OEM Carrier Transformer 40VA 120V-24V for C4850C48ZG030600
Carrier

OEM Carrier Transformer 40VA 120V-24V for C4850C48ZG030600

SKU: CARRIE-C4850C48ZG030600-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C4850C48ZG030600 — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C48ZG030600

This OEM control transformer (part# HT01BD236) is the factory-specified replacement for the Carrier C4850C48ZG030600 packaged unit. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and gas valve. When the transformer fails, the entire control circuit goes dead: the thermostat display may go blank, the system won't respond to calls for heating or cooling, and you may find a blown 3A fuse on the control board as a secondary symptom.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Direct factory replacement with exact mounting footprint and lead configuration
  • OEM vs Generic: This OEM transformer is wound to Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat under normal control circuit loads, causing nuisance tripping or premature failure of downstream components like the contactor coil.
  • Install difficulty: 2/5 — Shut off all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output before reassembly). Note wire colors and terminal positions before disconnecting leads. Replace the 3A control fuse if blown.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier C4850C48ZG030600 packaged unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or existing transformer label before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions.

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 C4850C48ZG030600?
Yes. This is the factory-specified OEM transformer for the Carrier C4850C48ZG030600. 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 C4850C48ZG030600?
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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