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I've also just done the following - CH set to on, and then ran all the hot taps to 'empty' the storage tank - someone told me this should kick the boiler in. It didn't, so all i have is no hot water!

Results of testing.... Had a look inside the valve, microswitch operation seems ok. there are 4 wires from the valve, Grey, Orange, Blue & Brown/white. I looked at what went live whenever i selected hw or ch, so here goes: All Off - Grey Live CH selected - Grey & Brown/white live...

After a bit more playing around, I don't think the 3 port valve is broken. I think the controller is wired up wrong? the symptoms are: 2 hours after he ch/hw timed cycle has finished, I put the CH on - boiler fires for a few minutes, then stops. Played with room thermostat, but that is not...

Hi, Just moved into a new house, and I'm having trouble with the CH system. I'm no expert on these, so please excuse any vagueness... The boiler / CH / HW work fine when both set to timed on the controller, plenty of Hot water, and Radiators get hot. If I go to switch the CH on by...