Central Heating

Honeywell Smartfit showing F2 fault

Anonymous user 09/03/2024 - 3.12 PM

I have a Vaillant system boiler controlled by a Honeywell Smartfit. Yesterday I had no hot water and went to investigate. Controller was displaying a fault code F2, I have checked the cables, they're all attached correctly. I think it may be either a fault with the actuator or the 3 way valve. Is there an easy way to find out which of the components is faulty before I purchase replacement part or parts. Thanks Thanks for your answers I am very grateful. Weirdly the unit displayed the fault for over a week and then I noticed the clock was back on. I slid the controls to constant and the boiler fired up, it's been working on timed hot water ever since. Can't explain it.