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Sub-Zero EC 50: what it means and what to do

Applies to: Older Sub-Zero 600 and 700 Series·Reviewed by Doug Major, Vantage Appliances
The short answer

EC 50 is a run-time error: the control has detected the unit running more than it should. A dirty condenser is the most common cause, so clean it first, then watch the temperatures.

EC 50 is a run-time error. The electronic control has detected that the unit is running more than it should.

One thing that makes a unit inefficient and run too much is a dirty condenser. Condenser cleaning should be done regularly; in Calgary and area, we recommend at least once a year. Cleaning instructions are in the use and care manual that came with your refrigerator, or a factory-certified servicer can clean it for you.

What to do if EC 50 is displayed

  1. Clean the condenser, especially if a second code, EC 40, is also showing.
  2. Monitor the fridge and freezer temperatures.
  3. If the condenser is clean and temperatures are at or close to normal, turn the unit off, wait a minute, and turn it back on. The EC code will go away, and a steady service message appears in the top centre of the display, replacing the flashing one. That means the code has been stored, not erased. A factory-certified servicer can erase stored codes.
  4. If the EC code comes back, call your factory-certified servicer for diagnosis.