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Ideal Isar HE24 Pump on with C on display nothing on?

My Boiler is switching on pump without Central Heating or Water called for. This is in addition to normal t cycle, can anyone offer a solution.
Mick (Benkbonk), May 2012
are any of your hot taps dripping?

tony, May 2012
ideal isar he24
47-348-31
C on display
CH & DHW not calling [OFF]
is the boiler located inside the main house ?
or is boiler located in a cold unheated area?
[garage outhouse shed etc]
if boiler located in cold area check frost stat & pipe stat settings

manwithnoname, May 2012
link Click here to see other fixes for Ideal Isar HE24.