glow worm swift flow 100 HELP?

Hello a few years back i had a problem with my swift flow 100 combi boiler, the pilot light wouldn't light. After seeking a plumber he replaced the grundfos pump and all is well. I have a problem again.... My main burner won't fire up? When i switch the power on, the light that indicates the system is running goes off as if it's tripped something out. The pilot light is burning and i can hear and feel the pump running, also i noticed i'd been losing pressure over a couple of days.... PLEASE HELP ME
steven burns, January 2006


done
Why is my low pressure light flashing the pressure an water flow have been topped up but its still flashing

Andrea kelly, October 2015
I have heating, but when I turn on the hot tap the burner goes out and have no hot water, when I turn of the water the heating comes back on.
Help

Antony, January 2010
Hi I have a swift 80 combi boiler there are 2 flow centers, one for heating and one for hot water supply. I need to change the later where within the boiler is it situated?
Are the 2 centers side by side?

Nolan, August 2008
Thanks Graham for that i'll check the fan noise outside house. I have noticed that the boiler makes a noise intermittently even with it being isolated, like a shuddering noise is that the wind from outside?

steve burns, January 2006
hi,
the loss of pressure is a secondary fault not causing the main problem. can you hear the fan running in the top of the boiler/flue outside? if so then it is either the air pressure switch or the circuit board at fault. if no fan noise, then it could be the circuit board or the temperature sensor. also in this case could be a water flow sensor. not easy to resolve on your own i think; need a good boiler engineer...

graham, January 2006
link Click here to see other fixes for Grundfos.