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OEM Carrier Transformer 40VA 120V/24V for C4850C48ZG050600
Carrier

OEM Carrier Transformer 40VA 120V/24V for C4850C48ZG050600

SKU: CARRIE-C4850C48ZG050600-TRANSFORMER-HT01BD236 Brand: Carrier
✓ Guaranteed to fit C4850C48ZG050600 — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Transformer 40VA 120V to 24V for Model C4850C48ZG050600

This OEM control circuit transformer (part# HT01BD236) is the factory-specified replacement for the Carrier C4850C48ZG050600 packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dark — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no diagnostic codes appear because the board itself has lost power.

  • Specs: 40VA output | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched construction for Carrier packaged equipment
  • OEM vs Generic: OEM transformers are wound and potted to Carrier's exact VA and voltage specifications, ensuring stable 24V output under full control-circuit load. Undersized generic replacements can sag below 24V, causing erratic contactor chatter, nuisance lockouts, and premature board failure.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 0V at primary leads before handling. Photograph all low-voltage wire connections before removal.
  • Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier C4850C48ZG050600 packaged unit. Cross-reference OEM part number HT01BD236 against your unit's wiring diagram or data plate before ordering to confirm 40VA 120V/24V specification. Our HVAC parts specialists are available to verify fitment — contact us before you order if you have any questions. Order today and get same-day shipping on this in-stock OEM part.

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 C4850C48ZG050600?
Yes. This is the factory-specified OEM transformer for the Carrier C4850C48ZG050600. 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 C4850C48ZG050600?
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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