centroller 3000 central heating programmer

[bilby]

hi all,when we slide our central heating switch to continuous on our centroller 3000 programmer,all the display vanishes and we have to turn off the spur feeding the programmer to get display on again.we can set the clock,and set up the times we want for water and or heating to come on.hot water works fine,but as i say heating just seems to knock off the programmer. new programmer i assume but thought i would post this first in case anyone had any other thoughts.thanks