Ferroli Optimax HE 31C Error 37f HELP

[scorps]

this boiler has a built in filling loop the two black knobs need opening up fully until pressure rises then turning back off,

 

[vandacolgate]

thanks a lot everyone for all your help, i now have hot water & central heating!
thanks again

 

[PlumbBobBob]

glad to help

 

[JellyJuJu]

Hi, I have used this to fill the pressure a couple of times, but the guy who installed it must have left something partly open, now i can't seem to turn the correct taps to fill the system (since having a new diverter installed last week). Could someone explain or preferably post a picture/ diagram of where all the blue and black taps should be please? the manual is hopeless.
Failing this, what fault is it likely to be if i am unable to fill from the mains?
Thanks

 

[Davidee]

I have the same boiler ferroli optimax he plus 31 c and the same problem but this solution doesn't work for me. I came back from holiday tried to switch the heating on and it didn't work. I looked at the boiler and it's leaked some water and the pressure is at 0.4 bar.

I opened the black nobs but it doesn't increase the pressure.

Can someone help please

 

[PlumbBobBob]

did you turn your water off before you went on holiday?

 

[sparra1100]

they have a none return valve on the cold side that gets stuck once it does it has to come out or get a new cold inlet otherwise you wont fill it its happened to me loads of times there should be a 5 yr guarentee on the boiler call them out

 

[Davidee]

Thanks, I ended up having to get Scottish Gas round. They fixed the leak in the boiler and did something so that the filling loop became unstuck and allowed it to be re-pressurised.

I have also been reading online and people are saying that Ferroli boilers aren't that good, does anyone actually like them?