Bosch EasyControl displays error C11 and schedules or settings frequently reset or are lost after power interruptions.

Safety first: Work only with external power isolation; do not open the EasyControl casing.

• 1. Stabilize power: Ensure the EasyControl is powered from a reliable circuit. Avoid frequent manual power cycling or switching via plug-in timers.
• 2. Reconfigure once: After a clean power cycle, re-enter schedules and settings via the app. Monitor whether they persist through subsequent short power cuts.
• 3. Firmware update: Use the app to check for and install any available firmware updates, which may address memory handling issues.

Professional help: If C11 persists and settings continue to be lost, the internal memory or backup circuitry is defective. The EasyControl unit should be replaced under warranty or by a qualified technician.