Diagnosis
The C6 or C7 error is a temperature sensor fault during the Yogurt program. The pot cannot reach or maintain the precise low temperature required for fermentation, typically because the inner pot was not at room temperature to start.
How to Fix It
For C6/C7: 1. Press Cancel. 2. Unplug the unit for 5 minutes to reset. 3. Plug it back in. 4. Ensure your milk mixture has cooled to between 95°F and 115°F (lukewarm, not hot) before placing the inner pot back in the base. 5. Restart the Yogurt program.
If That Didn't Work
The ambient room temperature may be too cold. Place the unit in a warmer location, away from drafts. Do not use the Yogurt program in a room below 68°F.
Heads Up
This error is specific to the Yogurt function. It does not indicate a general failure of the pressure cooking functions. Always use a kitchen thermometer to verify your milk mixture is in the correct temperature range before starting.