Vokera 20 e pump continues to run on the D/H/water side after shut down (should be for 30 seconds to dissipitae residual heat then stop),C/Heating shuts down after 30 seconds as per book,D/H/Water zone valve replaced but no difference.could P C B Board be faulty ?

Richard P, June 2008

Thanks Mr T for your help
It will continue to run untill the D H W timer programme comes to the end of its auto x hours cycle it will then shut down,or manually switching off it stops in 30 secs of being switched off,unlike the c/h which cuts off after 30sec automatically (when the heat has reached pre set thermostat temperature setting) and shuts down and starts up as normal ,although it could have x hours left to run on the timer programme

Richard P, June 2008

how long does it run for if left alone? continuious?
it could be just still tryiny to dissipate the heat left in the boiler (with the diverter in dh mode its a short circut and may take a bit of time)

T, June 2008