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OEM Carrier Transformer 40VA 120V to 24V for C4850C48ZN060200 — Ships Today
Carrier

OEM Carrier Transformer 40VA 120V to 24V for C4850C48ZN060200 — Ships Today

SKU: CARRIE-C4850C48ZN060200-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA for Model C4850C48ZN060200

This OEM control transformer (part number HT01BD236) is the factory-specified replacement for the Carrier C4850C48ZN060200 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 this part fails, the entire control circuit goes dead — your thermostat will show a blank screen or no response, and nothing in the system will operate regardless of thermostat settings.

  • Specs: 40VA rating | Primary: 120VAC | Secondary: 24VAC | OEM Part# HT01BD236 | Factory-matched output tolerance for stable low-voltage control circuits
  • OEM vs Generic: OEM transformers maintain tighter voltage regulation under load, protecting sensitive control boards and thermostats from voltage spikes. Generic substitutes may output unstable 24V, causing nuisance lockouts or premature board failure.
  • Install Difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify output voltage after installation. Photograph all wiring connections before disconnecting the old transformer.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier C4850C48ZN060200 packaged unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate before ordering. If your control circuit breaker is tripping repeatedly, inspect low-voltage wiring for shorts before replacing this transformer. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back up and running today.

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 C4850C48ZN060200 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C4850C48ZN060200 — 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 C4850C48ZN060200 — 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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