Hi all, I wonder if anybody would be able to give some pointers as to what possibly could be wrong with my central heating.
Valliant ecoTEC Plus 831 sealed central heating system
Thermostats controlled by Honeywell Evohome, kept in the living room with individual electric TRV heads in 3 bedrooms and the hallway.
For full disclosure, the boiler also supplies hot water to the kitchen tap and then also to a Megaflo Unvented hot water cylinder that is used to supply hot water to 2 bathrooms.
So the issue is that all of my radiators upstairs are getting luke warm and everything downstairs is staying stone cold. It did this for a few days back in October when the heating first started kicking in this year. At that time I tried shutting all of the radiators off and then turning one on but nothing I did made any difference until after a few days it started working all by itself again. Since then it has been fine, had its yearly service where the expansion vessel was changed, until yesterday when it is doing exactly the same again. I have been through the same routine of turning all of the radiators off but again, it doesn't make any difference.
So what could the problem be? Air lock? Pump on its way out? Sludge in the system? What do you think!?
Valliant ecoTEC Plus 831 sealed central heating system
Thermostats controlled by Honeywell Evohome, kept in the living room with individual electric TRV heads in 3 bedrooms and the hallway.
For full disclosure, the boiler also supplies hot water to the kitchen tap and then also to a Megaflo Unvented hot water cylinder that is used to supply hot water to 2 bathrooms.
So the issue is that all of my radiators upstairs are getting luke warm and everything downstairs is staying stone cold. It did this for a few days back in October when the heating first started kicking in this year. At that time I tried shutting all of the radiators off and then turning one on but nothing I did made any difference until after a few days it started working all by itself again. Since then it has been fine, had its yearly service where the expansion vessel was changed, until yesterday when it is doing exactly the same again. I have been through the same routine of turning all of the radiators off but again, it doesn't make any difference.
So what could the problem be? Air lock? Pump on its way out? Sludge in the system? What do you think!?