Less is more

[Hogarth]

I have a Ferolli Modena boiler that works perfectly with the cover off but hot water fails with it on. Any ideas please

 

[mysteryman]

There is almost certainly something wrong with the flue or air intake. This can be dangerous. Call in a professional.

 

[Hogarth]

The flue is short clear and clean. aside from that why would the boiler perform OK when demand is for CH only but subsequently fail when demand is made for domestic hot water.

 

[kevplumb]

get an rgi in and stop even thinking about it

this is not diy

and before you ask yes myself and mm know whats wrong

 

[Hogarth]

Thank you guys I will call in Brit Gas on their fixed fee.
This problem is obviously beyond my technical understanding.
But as I installed this boiler, flue, timer ,11 Rads, Shower, sweated soldered and wiped every joint with run offs, non return valves and thermostatic valves to a 3 storey home 6 yrs ago, I thought I might ask It has performed fine until recently.

 

[kevplumb]

ooh didn't he do well

thats plumbing fella

peeing about with boilers is a whole different ball game

 

[Blackadder43]

But as I installed this boiler, flue,

And how was that gas check?

Just because you can install the stuff it doesnt mean you know how to fix it...safely......

 

[Hogarth]

Got a Corgi for the gas and got a sparky mate for the earthing, I'm not stupid but like to do that which is achievable. Oh I forgot to add I also installed a carbon monoxide detector and got a sparky mate for the earthing.
I just hope the parts and labour are not less than the std BG call out, you pays your money and.....

 

[kevplumb]

yup thats the way it is fella

 

[Hogarth]

Thanks Yank, I owe you, but you knew that already, did you not

 

[kevplumb]

no
and FYI i am not a yank i just happen to live on the wrong side of the pond

i am a monkeyanger (google it)