Hi, my first post on this forum so here goes-
My combi boiler hot water goes hot then after a while runs cold - then about a minute or more later starts getting hot again - this cycle happens in a cycle
I have been searching the site and found it it could be the secondary heat exchanger, flow rate issue, gas setting issue or even a flow switch issue.
My boiler doesn't have a secondary heat exchanger, so I ruled that out.
The flow rate at the tap after measuring is approx 9 litres a minute.
I have not checked gas settings for obvious reasons
I guess the flow swith (this boiler has a turbine, which is similar I believe or does same job could be faulty, but am not sure how to check this?
But how can I test the hot water thermistor? I know you have to check resistance across its terminals, but I have heard that when cold they can be ok and when hot go faulty - is there a way I can check the thermistor?
Thanks for reading my post and I'd be grateful for any help offered
SJ
My combi boiler hot water goes hot then after a while runs cold - then about a minute or more later starts getting hot again - this cycle happens in a cycle
I have been searching the site and found it it could be the secondary heat exchanger, flow rate issue, gas setting issue or even a flow switch issue.
My boiler doesn't have a secondary heat exchanger, so I ruled that out.
The flow rate at the tap after measuring is approx 9 litres a minute.
I have not checked gas settings for obvious reasons
I guess the flow swith (this boiler has a turbine, which is similar I believe or does same job could be faulty, but am not sure how to check this?
But how can I test the hot water thermistor? I know you have to check resistance across its terminals, but I have heard that when cold they can be ok and when hot go faulty - is there a way I can check the thermistor?
Thanks for reading my post and I'd be grateful for any help offered
SJ