6 displayed in the right hand display window indicates that the boiler is running at full output, this is usually when the cylinder sensor is calling for heat.
Tim
Tim
If it's a classical S plan then I think that parameter should be set to 3. Setting it to 1 is for when you wire a cylinder sensor or thermostat directly to the boiler, which I'm guessing hasn't been done. It's now expecting something to be connected across a couple of terminals to signal that it can stop trying to heat the hot water cylinder. This isn't there so it probably will run more.So when previously it was set to 3 (Heating only), the new setting is 1 (Heating only + External DHW tank).
I wanted to ask you, is this hot water mode ok to run, and what is the essential difference between this and central heating mode, as the boiler is just providing the heat and everything else controlled by the zone valve, thermostats and programmer.
Thanks
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