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OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZG035200 — Ships Today
Carrier

OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZG035200 — Ships Today

SKU: CARRIE-C4850C50ZG035200-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C4850C50ZG035200

This OEM control transformer (part# HT01BD236) is the factory-specified replacement for the Carrier C4850C50ZG035200 packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all other low-voltage control circuit components. When it fails, the entire control circuit goes dark — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and you may find a blown 3A fuse on the board as a telltale sign of transformer failure.

  • Specs: 40VA rating | 120V primary / 24V secondary | Class 2 transformer | Direct OEM replacement for part number HT01BD236 | Meets original factory electrical specifications
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA rating and thermal protection standards. Undersized or off-tolerance generic units can overheat under load, trip thermal cutoffs repeatedly, and shorten the life of connected control boards.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdriver, wire stripper, multimeter. Label or photograph all wiring before disconnecting. Verify 24V output with a multimeter after installation before closing the cabinet.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier C4850C50ZG035200 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 fitment team is available to confirm compatibility before you purchase — reach out anytime. Order today and your part ships same business day.

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 C4850C50ZG035200 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C4850C50ZG035200 — Ships Today. 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 C4850C50ZG035200 — Ships Today?
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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