RT520 Series Boiler Plus Compliant Thermostat | 7.2. Common Issues | Help Center
1. Hand Symbol on Screen
2. Heating not following schedule times.
3. Snowflake Symbol on Screen
How do I remove the thermostat from the wall ?
Where are the batteries ?
Switching off the Service Mode warning.
Screen backlight randomly turning on and flattening batteries.
Thermostat randomly turns heating up or down on its own.
High pitched whine or fast clicking sound from thermostat.