Ariston eurocombi mffi a23

[Gazlar85]

Some advice please

the boiler has had a new main and secondary heat exchanger and a diaphragm

but still won't maintain hot water temp

when the hot water is drawn the burner fires up and then quickly drops to low then back to high, no modulation in the burner

would this be gas valve or pcb problem?

thanks for any help guys

 

[Chalked]

Hi
The forum cannot give advice on gas appliances that the public can see too.

We have a private sub forum for gas safe registered installers. Loads of great advice. You will need to increase your post count to 10 posts, to make sure your genuine. Then message an administrator with your gas safe number and your in.
This won't get your answer straight away, but will be worthwhile in the future.
Get posting!
Maybe start by introducing yourself?

 

[Riley]

Welcome along. You need to read the forum rules as we will NOT in any circumstances give gas related advice to DIYers. If you are Gas Safe then please use this http://www.ukplumbersforums.co.uk/g...ic-forum/82396-entry-into-gsr-only-forum.html

 

[Rickster123]

Good advice given above.