Hi All,
I have Vokera Mynute 20se Boiler - its about 12 years old. I will describe the setup, and what I have done so far, in just a moment. The system works fine for HW and CH when we want it. The issue is that even every 15 minutes or so, day and night the boiler fires up for about 60 seconds, and then turns off. And this happens when the CH and HW are not on. The constant turning on is not only burning through my finances, also now kettling really badly. In fact the kettling is far worse when there is no draw on the system i.e. when it randomly turns on and off.
So the setup is this (and sorry if some irrelevant info here): It is set up as a 'system boiler' I believe (whatever that means). The boiler is in the kitchen, the thermostat is in the dining room, the digital timer control is in the airing cupboard, there is a megaflow in the loft, there is a hot water ring main (not sure its called that). In the airing cupboard is a small radiator connected to the HW system, not the CH system.
To attempt to resolve the situation, I have turned off the HW radiator in the airing cupboard. I have had the 'frost-stat' in the loft changed, and the heating engineer also changed a pump in the loft (I'm not sure that it does, but engineer says that it's constant on-off over many years, the mechanical arm under the plastic cover gets bunged up, and so doesnt fully operate). I've made sure there is enough water in the system (about 1.3 bar at the moment), and I have bled all the radiators multiple times. Also I have turned off the hot water ring.
I am now thinking about looking into each individual components inside the boiler to see if something is wrong. Could it be there is an internal thermostat that has deteriorated and keeps telling the boiler the water is freezing.
Does anyone have any ideas?
Thanks
I have Vokera Mynute 20se Boiler - its about 12 years old. I will describe the setup, and what I have done so far, in just a moment. The system works fine for HW and CH when we want it. The issue is that even every 15 minutes or so, day and night the boiler fires up for about 60 seconds, and then turns off. And this happens when the CH and HW are not on. The constant turning on is not only burning through my finances, also now kettling really badly. In fact the kettling is far worse when there is no draw on the system i.e. when it randomly turns on and off.
So the setup is this (and sorry if some irrelevant info here): It is set up as a 'system boiler' I believe (whatever that means). The boiler is in the kitchen, the thermostat is in the dining room, the digital timer control is in the airing cupboard, there is a megaflow in the loft, there is a hot water ring main (not sure its called that). In the airing cupboard is a small radiator connected to the HW system, not the CH system.
To attempt to resolve the situation, I have turned off the HW radiator in the airing cupboard. I have had the 'frost-stat' in the loft changed, and the heating engineer also changed a pump in the loft (I'm not sure that it does, but engineer says that it's constant on-off over many years, the mechanical arm under the plastic cover gets bunged up, and so doesnt fully operate). I've made sure there is enough water in the system (about 1.3 bar at the moment), and I have bled all the radiators multiple times. Also I have turned off the hot water ring.
I am now thinking about looking into each individual components inside the boiler to see if something is wrong. Could it be there is an internal thermostat that has deteriorated and keeps telling the boiler the water is freezing.
Does anyone have any ideas?
Thanks