Schedule Err
Worcester Bosch
Corrupted schedule data or memory write failure
Thermostat displays 'Schedule Err' or refuses to save new schedules; heating runs at unexpected times.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Firmware glitch corrupting schedule storage, Insufficient internal memory, Faulty EEPROM/flash on main PCB, Incomplete firmware update
How to Fix / Troubleshooting
Safety first: No mains work is required.
- Backup settings: If the thermostat is linked to an app, note down or screenshot your current schedule and temperature settings.
- Factory reset: Use the installer or advanced settings menu to perform a factory reset. This will clear all schedules and custom settings.
- Reconfigure: After reset, set the date/time and re‑enter your heating schedule manually or via the app.
- Update firmware: Check for and install any firmware updates to prevent recurrence.
- If schedule still corrupts: The internal memory (EEPROM/flash) may be failing. Replacement of the thermostat is typically required.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Smart Thermostat Main PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements