Combi Boiler Constantly Cuts out and relights

[desperateDave]

Hi,

I've a problem with my Jaguar (rebranded glow-worm) boiler that I'd like some advice on. When ever we turn the hot water on the boiler will light, stay on for about 5 seconds, then go out, relight, stay on for 5 seconds then go out. It will do this for about 5 minutes maintaining just about a luke warm temperature and then eventually will stay lit and rise to the correct temperature. I think its the same when the heating comes on too, but tis hasn't been on much over the summer so not really tested. Any ideas what would cause this?

Thanks

 

[kevplumb]

poss sticky lazy pump

 

[petit_pablo]

Honeywell ignition board fitted on these i think. Sounds like a fault these do. Had the same on a saunier duval

 

[shambolic]

Also check flue is ok in case boiler is smothering. May be rectification on pcb (if it has one)