boiler fires up for 5 seconds then switches off

[arrr what now!!!!]

hi ive got a baxi bahama 100 combi boiler, its 3 years old. the problem is that it fires up for 5 seconds then switches off, then fires up again about 20 mins later and so on, but i only have about 10 seconds hot water and radiators take forever to warm up but they only get warm not hot. tried flushing the system incase of sludge, replaced flow switch, it worked for aday then went back to switching itself off!! anyone any ideas what it could be?? with the winter coming need to sort it out before my baby and my wife leave me for sunny climates................or someone with a boiler that works!!! cheers guys [/b]

 

[ChrisR]

Suggest you do a search on "bahama" in the plumbing section. I warn you it'll make you depressed. Better start rubbing stick together.

 

[P.J.]

I had a similar problem when the pump was siezed. The unit was quickly overheating and then cutting out. It was accompanied by a loud crackling sound from inside the boiler which was the water boiling!

Sounds a bit different to yours but I would try a bit of fault diagnosis by swapping pumps or get the pros in.

Cheers,

P.J.

 

[arrr what now!!!!]

thanks for the replys, ive fixed the problem now. For anyone that might have the same problem, i only changed the central heating flow switch last time so i changed the central heating flow switch again and also replaced the hot water flow switch, gave the system some descaler aswell and it now runs perfect cheers