On the boiler i have the overheat cut off device is situated on the heat exchanger,and the the high low thermostat is behind the actual switch.but from the information you have told me it sounds like the pump is the problem.there is no sound of banging in the pipes though.
but will this sort...
both upstairs and downstairs rads got luke warm,i did not bypass the limit stat.the pump actually gets really hot after checking it again today is this normal?
yes thats correct the boiler fires up but cuts out after 3minutes the radiators seem to get luke warm and the pump seems to be running.
how does the boiler know to cut out if the pump is faulty is it linked to the pump overrun thermostat??
is there a way of checking that the fault is...
had another go today with the system,i didn't realise the central heating does not work as i have not had it on all summer.
When i put the heating on it cuts out after 3minutes the radiators get luke warm and then cuts off.i thought it could be the overheat stat on the boiler so i bypassed that...
What details do you need??
I thinks its a S plan system as it has
2 x 2port valves
between this is a gate valve with red top
1 x pump
what other things do i need to look for?
The 2port valve i have already changed or is that different to the motorised valve?
and at the...
when i switch the button on the boiler down to hot water only the boiler does not fire up? but when put onto heating and hot water it fires up.i thought it might be the motorised valve but this has not solved the problem. cheers