Written Estimate First
Nothing is repaired until you approve it
Sub-Zero EC 05 or EC 06 on the Panel
These two codes are about what the refrigerator is measuring rather than how hard it is working. Sub-Zero treats both as service codes with no owner fix.
Sub-Zero’s Definitions
For 600 and 700 Series refrigerators, Sub-Zero says EC 05 means the refrigerator has repeatedly read erratic temperatures. EC 06 means the evaporator thermistor has read open or shorted for more than 10 seconds or, as with EC 05, that the refrigerator has repeatedly read erratic temperatures. Sub-Zero states that customer troubleshooting is not available for either code and asks owners to share the code and current temperatures when they contact its Factory Certified Service. Source: Sub-Zero EC 05 / EC 06 answer (opens in a new tab).
Based in Plano
Serving homes across Dallas–Fort Worth
Real Warranty
90 days, 6 months for members
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Toward the repair if you go ahead
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Open daily, 8–8
What Goes Along With These Codes
Not every owner sees all of them.
What a Technician Checks
Sub-Zero names the sensor for EC 06; the rest is our test list.
What to Do Before Service
Sub-Zero lists no owner repair, so the goal is good information.
Write down the code
Note whether the panel shows EC 05 or EC 06 and when it first appeared.
Take real temperatures
Put a thermometer in each section for a few hours. Sub-Zero asks for current temperatures with the code.
Protect the food
If readings rise, move perishables to a cooler. FoodSafety.gov treats food above 40°F for more than 2 hours as unsafe.
When to Call a Technician
Schedule a repair if:
- Either code is on the display
- Readings swing several degrees
- Frost or ice in unusual spots
- The code returns after a reset
Related Help
Sub-Zero refrigerator repairMore help, including other Sub-Zero codes:
Sub-Zero refrigerator Service Flashing guideSub-Zero refrigerator Vacuum Condenser guideSub-Zero refrigerator EC50 error codeSub-Zero Undercounter Ice Light Flashing guideSub-Zero Designer Wine 40 1 09 error codeAll Sub-Zero repairSub-Zero EC 05 / EC 06 answerWritten estimate first
Need the Sensor Tested?
ALAS tests thermistors, wiring and the control on site and gives you a written estimate before replacing anything. We are an independent company, so units under Sub-Zero’s warranty should start with Sub-Zero.
- Diagnostic fee credited toward the repair
- 90-day warranty, 6 months for members
- Open daily, 8 AM–8 PM
Sub-Zero EC 05 and EC 06 FAQs
Sub-Zero says the refrigerator has repeatedly read erratic temperatures.
The evaporator thermistor read open or shorted for more than 10 seconds, or the refrigerator repeatedly read erratic temperatures, according to Sub-Zero.
Sub-Zero says customer troubleshooting is not available for these codes. A thermistor is a sensor, so it has to be tested with a meter.
Sub-Zero’s article names the 600 and 700 Series refrigerators.
ALAS Appliance Repair
Book an Independent EC 05 / EC 06 Diagnosis
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- Real Warranty
- Based in Plano