how can i fix thermostat?

have a Drayton digistat + room thermostat 83251 , put new batteries in but screen says -E8- with or without pressing set ??
mike griffiths, January 2018


done
http://www.draytoncontrols.co.uk/installers/trouble-shooting/frequently-asked-questions

Contact the technical helpline on 0333 7000 622 and seek their assistance.

asfdgab, January 2018
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