vaillant ecomax pro boiler not working ?
we have recently changed the radiaters thermostat and boiler stopped wworking,we took the advise for fault f6,over heat thermostat tripped ,this was done straight way,it worked fine that night and stopped nest morning,fault 6,10 and 24 displayong all relating to nts and pump,
please help very cold in the house
sami, February 2010