Why does the boiler come on when there is no demand for heat?

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Andysunday88_
Andysunday88_ ✭
in General Questions & Topics
Boiler keeps randomly coming on even though on all radiators and room stats are off on the program.

Mainly keeps happening at night when there is no call for heat.

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  • wateroakley
    wateroakley ✭✭✭
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    Take a look at the Tado app room charts to look for any 'call for heat' (the dark lines) that correspond with the random boiler 'on' time. Other than the controls, it could be many things. E.g. combi boiler pre-heat cycle. Internal or external frost stat kicking in during cold temperatures. Boiler water pressure too high or too low. Boiler control fault. Rapid cooling of a room, although Tado will probbaly complain of an 'open window'.

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