Problem fault with code error FF. Reset and nothing...only the some code... Dont know why? When the two button in Zero position give me a code error 87... Need help please!?! I think it isnt good product... Viesmann please help me !?!
How did you set the parameters for the pcb to match the boiler. I have 35kw combi but can’t get the parameters to flash from 1-12 when I follow the instructions
What temperature would you say the boiler should sit at idle? Mine is set to 65c would you expect this to drop to say 30/40 when I'm not using jt for heating or water ?
