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OEM Carrier Transformer 40VA 120V/24V for C4850C48ZG035600
Carrier

OEM Carrier Transformer 40VA 120V/24V for C4850C48ZG035600

SKU: CARRIE-C4850C48ZG035600-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C48ZG035600

This is the OEM factory-specified control transformer for the Carrier C4850C48ZG035600 packaged unit. The transformer steps line voltage (120V) down to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the system goes completely unresponsive: the thermostat goes blank, the unit will not call for heating or cooling, and nothing turns on. A failed transformer is often caused by a downstream short in the 24V control wiring, so inspect low-voltage wiring for faults before installing the replacement.

  • Specs: 40VA capacity | Primary: 120V | Secondary: 24V | OEM Part Number: HT01BD236 | Designed to factory tolerances for the C4850C48ZG035600 packaged unit series
  • OEM vs Generic: OEM transformers are wound and rated to exact factory VA and voltage specifications, ensuring full protection for sensitive control boards. Generic replacements may run underrated, causing premature failure and potential control board damage under high-demand conditions.
  • Install Difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always verify incoming voltage at primary terminals before energizing. Confirm there are no shorts on the 24V secondary circuit before installing the new transformer.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct OEM replacement for the Carrier C4850C48ZG035600 packaged unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. Need fitment confirmation? Our HVAC parts specialists can verify compatibility before you buy — no guesswork required. Order now and ship 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 C4850C48ZG035600?
Yes. This is the factory-specified OEM transformer for the Carrier C4850C48ZG035600. 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 C4850C48ZG035600?
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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