Ferrolli F30 Domestic hot water supply cuts out.

[bloggit]

Ferrolli F30 Domestic hot water cuts out??

Sirs,I have a Ferrolli F30 combi boiler. The domestic hot water supply from it goes cold about every minute for about 10 secs then heats up again, usually when in the shower.Annoying, but it may fail altogether eventually. This appears mainly when the central heating is running at the same time. DHW switch is at mid-point.

what is the likely cause please?

I have the installation and service documents, and am competent at diy. Have installed room stat on boiler successfully.

Boiler installed 1-9-2004​

 

[SimonJohns]

Ferrolli F30 Domestic hot water cuts out??

I have the installation and service documents, and am competent at diy. Have installed room stat on boiler successfully.
​

Not a DIY job!!

 

[justalex81]

call an engineer. you're not qualified to work on it

 

[scoullar]

could be a few things hot water heat exchanger, diverter valve, a passing mixer tap or shower if your in a hard water area my bet is the exchanger blocked with scale but better off getting a engineer to pin point the fault these type of faults can be hard to pinpiont you need the right equipment for this

 

[RoryD]

It'll be the gas ranges, but you will be breaking the law if you touch it. Be sensible mate and call a GSR engineer