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Mend Llandis+Gyr RWB XP Heating Programmer Display

how can i reset my llandis gyr rwb xp programmer?

ive took front of programmer off but i cant seem to reset it . back up battery is working but time display is showing h/w on c/h on boost on both and h/w on advance,h/w on sign and c/h on/off sign is there a reset on them

shane
January 2015

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