Vokera 80E

[vokera80e]

hi all..i have a vokera 80E combi and the problem started last night with radiators getting red hot well over 60 centegrade,i usualy keep it set at 35 c at the boiler, i don't use a room thermostat.i turned the ch knob down to zero,but it's still goes over 60c, and also the ch is running on dhw mode..could this be a thermostat problem,and why is the ch running in the dhw mode aswell...Thanks.

 

[cross thread]

could be sticking water flow micro switch

 

[vokera80e]

could be sticking water flow micro switch

i will certainly look at that,i just wondered why the ch/dhw was still operating with dials turned to zero,could the thermomistor play a part in this..

 

[vokera80e]

could be sticking water flow micro switch

there is 2 switches on this excell,the boiler flow switch was intermitent when i put a continuety test through ,and i will change the hw switch aswell.thanks to GORDONGAS for his help..