Hot Water Tank Continuously On, Water Too hot, i have Tribune He Water Tank which is continuously on and the tank cupboard temperature is too warm, i have an Ideal HE15 Boiler in Kitchen with Dnfoss programmer. When i turn off the mains the hot water tank stops along with the Boiler itself, but when i turn the boiler off from its own on/off switch the hot water tank keep running, and when i turn off hot water from Danfoss programmer fitted next to the boiler , the hot water tank still keeps running so i think its a faulty Danfoss fp715 programmer