My Ferroli modena combi boiler will only go when the front casing is left off. Otherwise it won't come on when it should. I have cleaned out all the grit (it clogs up the fan and gets in the ventura valve- a recurring problem in this model). I had a new expansion vessel fitted last year after yrs of problems with the water pressure and red herrings about non-existent micro leaks from the engineers and the pressure problems seem resolved now.

Mrs P Evans, January 2011

I agree with DEANO RGI its just not worth it your life is worth more then that dont do it get a reg person in it wont cost that much..

MARCUS, January 2011

The problem with your boiler is it needs the venturi on the fan cleaning. This is the bit that the silicone hoses attatch to the fan.

M, January 2011

you will not get the answer to the problem with your boiler on here or anywhere else as the problem you have can only be repaired by an rgi.if you run your boiler without the casing on it you are putting yourself and your family in serious risk of carbon monoxide poisining,also it is against the law to remove the boiler casing unless you are an rgi as only we can test and certify your appliance is safe to use.do yourself a favour and call an expert, it might save your life instead of a few quid.

DEANO RGI, January 2011