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Mend Potterton EP4001 Boiler Heating Controls

how can I make my Potterton ep4001 timeswitch work manually?

my potterton EP4001 timeswitch has a large A in the bottom left corner of the display and now the controls no longer work. The boiler is now set to continuous and the clock won't change nor can change the setting from continuous to Auto. How do i get this to happen

Graham Mace
December 2009
PottertonPotterton EP4001Heating, Home Heating SystemsBoiler Heating Controls
Take the top panel (timer box) off and on the back of the removable timer box there is a security switch which can be turned to "on" or "off". in the ON position this locks out the user controls and in the OFF positiion this allows use of the digital settings.

Macc Mark
January 2010

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Potterton EP4001 Timeswitch: Manual Mode & A Error