how can I fix my vokera combi boiler?

My combi boiler fires up ok but when for example I have a shower then when finnished turn it off then try and turn the shower back on the boiler will not fire up straight away I have to wait between 1/2 hour to an hour. Same type of thing with the heating. Fires up ok but will cut out after 1/2 an hour.
My boiler is only 18 mnths old and is a vokera Maxin 24e & 28e. Any help please
Amanda Sellars, July 2005


done
Thanks you were right it was the therm, now fixed and working

Amanda, August 2005
Change the boiler for a good 1! Na, sounds like a thermister problem. common fault on vokeras. Need to replace them. it thinks it is still too hot for too long. check pump runs after demand stops. may be pump over run PCB fault - in which case change the boiler!!!!!

craig, August 2005
link Click here to see other fixes for Vokera.