Vaillant Ecotec, mind of its own

[DNADoc]

Hi.
I have noticed that my Vaillant ecoTEC plus 824 is firing up on its own supplying heating to my radiators even when I have set the Drayton Digistat Thermostat off.

I had the system installed last Dec, it was a mild winter then. But now with a bitter winter it is firing up supplying heat at all hours. Is this to do with the anti-frost protection device? The Anti Cycling Mode is active and I wondered could this be having an affect?

I have resorted to switching the heating off completely on the Boiler and manually switching it on for when I need the heat.

I just wanted to make sure its a fault before I call out an engineer
Cheers

 

[simond]

If the boiler is outside this could be the issue.

However it is more likely you have the Drayton RF Digistat old (square) model and it's gone t*ts up. Very common.

The external controls calling for heat will be indicated by a radiator symbol on the LCD display of the boiler.

 

[Tipper]

Switching off the power disables the frost protection.

Not a good idea with the cold weather we are currently having.

 

[DNADoc]

Thanks Simond.
The Boiler is in the attic (which is v cold indeed).
And yes there is a small radiator icon (flashing which I think indicates Anti Cycling mode active) on the LCD display,

Tipper, thanks, I mean that I turned the Radiator dial to off (Summer setting) So no heating but hot water.

I'll have a look at the Drayton Digistat +2 controller.

 

[Deleted member 105431]

It would be worth turning the warmstart function off and lagging all pipes in the loft (except the gas).