Viessmann Boiler FF Fault

[linton.jaw]

Evening,

wondering if any of you boiler engineers have any ideas. I had to move a bathroom radiator and couldn't do it without draining the system down. I turned the boiler off and then drained the central heating from a drain off. I completed pipework alterations, topped the water back up, bleed radiators (pressurised system) and put the boiler (viessmann 100) back on. I got a fault code FF. I reset the boiler but still keep getting an FF fault code. Any ideas? I can't see that I've personally done anything wrong or out of the norm.

Look forward to hearing your replies

 

[ShaunCorbs]

Turn the boiler off and leave overnight sometimes they don't like being cycled on and off

If it still persists time to call a gas safe engy in

 

[townfanjon]

It sounds like you have drained the boiler too , it will need venting and or checking by a GS engineer.

 

[Ted808]

Yup you need engineer, these boilers are sensitive to air