Bosch EasyControl shows error C14 and energy usage or consumption data is missing or clearly incorrect.

Safety first: Isolate power before touching boiler control wiring.

• 1. Check compatibility: Confirm that your boiler model supports energy data reporting to EasyControl. Many basic models do not provide detailed consumption data.
• 2. Verify communication: Ensure there are no other communication errors (such as C1 or C2). Fix those first, as they can also affect energy data.
• 3. Firmware update: Update EasyControl firmware via the app to the latest version, which may improve energy calculations.
• 4. Reset statistics: In the app, clear or reset energy statistics and monitor new data over several days.

Professional help: If C14 persists on a compatible boiler with good communication, Bosch support may need to analyze logs or update firmware.