We had an extension last year which involved adding new rooms (2) and obviously radiators. We had a new boiler fitted at same time - ideal logic+ H30.
All was ok for few months but then boiler started to lock out at end of short heating cycles with L1 code. It only does this when the room thermostat calls for heat for say 10 mins to top up heating. A reset on boiler resolves it but it's a pain because you can't just leave the heating on to maintain a temperature.
The error code relates to lack of flow. It's clear that on those short cycles the water hasn't circulated fully and the boiler doesn't like it. If the house is heating from cold (i.e. heating runs for 25+ mins, it's fine).
We've changed the pump. All the rads work fine.
A pump overrun has been suggested but as it errors straight away when the room thermostat clicks off I don't see how the pump continuing will help. The pump always running would solve this but surely that isn't the solution!
The system did have the necessary additives put in.
My hunch is something in pipework restricting flow. If it is, what are options? Of course, pulling up floorboards etc wouldn't be ideal!
All was ok for few months but then boiler started to lock out at end of short heating cycles with L1 code. It only does this when the room thermostat calls for heat for say 10 mins to top up heating. A reset on boiler resolves it but it's a pain because you can't just leave the heating on to maintain a temperature.
The error code relates to lack of flow. It's clear that on those short cycles the water hasn't circulated fully and the boiler doesn't like it. If the house is heating from cold (i.e. heating runs for 25+ mins, it's fine).
We've changed the pump. All the rads work fine.
A pump overrun has been suggested but as it errors straight away when the room thermostat clicks off I don't see how the pump continuing will help. The pump always running would solve this but surely that isn't the solution!
The system did have the necessary additives put in.
My hunch is something in pipework restricting flow. If it is, what are options? Of course, pulling up floorboards etc wouldn't be ideal!