Ok I have a Main Eco 80 that is relatively new and hot water and CH are fine. How ever the boiler kicks in every so often sometimes 4 to 5 times a day with the HW demand light flashing for about 30sec to a minute as the boiler fires up as though someone has turned the HW tap on. I have checked that no one is taping into our supply. Also its been far to warm for the frost protection to be kicking in. If anyone has another solution or knows of a reason for this happening your input would be most appreciated.