So system seemed to be playing up a little cycling on and off with occasional f2 or l2. I decided to drain down, add cleaner F3 and rand for 4 days, drained down ran through until clear and added F1. Approx a week has now passed and now boiler is pretty much non functional with F2 or L2 occuring. I have just changed the grundfoss pump to ensure its not a week pump. Now when you turn on the boiler it cycles as expected and will even fire up, unfortunately it runs for a few minuites (feed and return are not getting warm) and then it will shut down and will not restart until boiler is turned of at mains switch after a while it will repeat the exact procedure again.
Any ideas, I noted the water from the filter has got a little grotty after fitting brand new pump. I am pretty sure although a littly grubby the old pump was functioning ok.
My thoughts are perhaps an air lock, a partial block, or maybe the heat exchanger has become blocked. Proffesional oppinions welcome, to comclude if to call ideal in on the fixed price, scrap it, or am I missing something. ?
I am certain its not an ignitor or flame sensor worn or gone bad. The flue is not blocked, the condense pipe is not blocked. It is recieving gas ok or it wouldnt fire up and run for few minuites, yet no heat on the flow or return pipes from the boiler.
Any ideas, I noted the water from the filter has got a little grotty after fitting brand new pump. I am pretty sure although a littly grubby the old pump was functioning ok.
My thoughts are perhaps an air lock, a partial block, or maybe the heat exchanger has become blocked. Proffesional oppinions welcome, to comclude if to call ideal in on the fixed price, scrap it, or am I missing something. ?
I am certain its not an ignitor or flame sensor worn or gone bad. The flue is not blocked, the condense pipe is not blocked. It is recieving gas ok or it wouldnt fire up and run for few minuites, yet no heat on the flow or return pipes from the boiler.
