may be wrong but last two with those symptoms have been hex, to the original poster have you considered getting worcester out on a fixed price repair around £190ish but gaurenteed to to sort it.
a lot are also taped over by homeowners to stop kids/accidental turn ons, if youve got the old type electic meter it will be easy enough to tell by how fast it spins when on/off.
boiler fires on and off a few times before coming on was thinking flame sensor or pcb but someone had trouble with wiring harness (anybody had trouble with these) any suggestions welcome, usually only do installs but you cant say no to family :?
just a couple of questions about greenstars. why after having them in service mode do you get the inverted t, flashing between the temptature, not always but some times. again after servicing why do you sometimes get ..(2 dots) either high or low on the display screen. im on a new contract which...
rather than the constant question popping up what boiler would you reccommend, thought it might be interesting to find out
1) what type of boiler/system people have fitted in there own home( and did they inherit it or fit it themselves), + has it given you much trouble
2) if you were to...
going back to the origanal question its best to check if its blocked before you do anything else open a drain of cock and drag some water through if the f + e tank ballcock runs the cold feed isnt blocked