EC35
Sub-Zero Door Glass Heater Fault

Wine cooler displays EC35 and may have issues with the door heater or anti‑sweat function; condensation may appear on glass door.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed heated glass assembly, Open heater circuit in door, Broken wiring through door hinge, Faulty heater control on main board

How to Fix / Troubleshooting

Safety first: Disconnect power before working around the door hinge or wiring. Glass doors are heavy; support them properly if removing.

Step 1 – Confirm condensation

  • Check for fogging or water droplets on the door glass, especially in humid conditions.
  • If EC35 is present and condensation is excessive, the glass heater may not be working.

Step 2 – Inspect hinge wiring

  • At the top or bottom hinge, locate the wiring harness that feeds the door.
  • Inspect for pinched, broken, or frayed wires.

Step 3 – Door heater testing

  • Testing the glass heater typically requires resistance measurements and access to door connectors.
  • If the heater is open (no continuity), the door glass assembly usually must be replaced.

Step 4 – Control board

  • If the heater and wiring are intact, the control board’s heater output may be faulty and require replacement by a technician.
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Repair Difficulty

Professional Required 5/5

Required Part

Heated Glass Door Assembly
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