hi mate, easyish job to sort, ive had the same problem, its the diverter valve.
andy t
February 2009
SORRY TO HAVE TO SAY THIS BUT GET RID OF IT. I'VE HAD A VOKERA 730 FOR 5 YEARS AND IT'S BEEN TOTALLY CR*P. ONE FAULT AFTER ANOTHER. BROKE DOWN THREE TIMES IN AS MANY MONTHS WHEN ONLY YEAR OLD. SAME EXCUSES FROM VOKERA, SAYING TEETHING PROBLEMS. LAST WEEK WAS THE FINAL STRAW WHEN THEY WOULDN'T COME OUT TO REPAIR IT. SAID I'LL HAVE TO WAIT SIX DAYS.TOLD THEM TO STUFF IT. GETTING NEW "IDEAL" BOILER FITTED FRIDAY.
VOKERA HATER
January 2009
or the flow switch
gareth
January 2009
if when the system is cold and u run the hot tap then if the radiators heat up then it is probably the motor on the change over valve