Electric combi boiler keeps cutting out.

[Stephen Tromans]

We have a 5 years old EHC combi boiler which switches the central heating off now and again ( no pattern that I can see ).
To get it working I switch through the programme options once or twice and it starts up.
It can be ok for weeks or days.
Can anyone suggest what is wrong with it please. Pressures are ok and no leaks from tundish.
Thanks

 

[pirate]

Not any kind of expert on this, but no leaks at tundish suggests no problem with overheating or pressure. Occasional switching points at a switching problem, and at 5 years old maybe the contacts are faulty, maybe in the controller itself, or at the stats.
An expert's opinion will probably save you ages trying to trace the fault...just a thought.

 

[Wilko]

Hi - perhaps look up the boiler instruction manual for fault codes. There's usually a code you can read on the boiler's screen that may shed light. Just a friendly reminder - boiler faults will need a gas safe registered person to fix them, and you may want to re-post this on the Plumbers Forum for assistance .

 

[solarsavings]

He won't need a gas safe registered bloke to work on an electric combi but he will need someone with a G3 ticket if it's the one I think it is.

 

[Wilko]

He won't need a gas safe registered bloke to work on an electric combi but he will need someone with a G3 ticket if it's the one I think it is.

Oops, should take remedial reading classes as I missed that entirely .

 

[Andy5678]

What’s G3?

 

[Stephen Tromans]

Thanks for the replies. I have been in touch with an engineer with a view to sorting it out after the new year.
Happy Christmas

 

[Taylortwocities]

What’s G3?

The Building Regulations Approved Document (section G3) requires an unvented hot water cylinder to be installed and maintained by a competent person. The G3 qualification, also known as an Unvented Hot Water qualification, provides plumbers with the knowledge & skills needed to work with such systems.

G3 does not apply to a combi boiler.

 

[solarsavings]

G3 applies to the ehc combi boiler because it stores more than 15 litres of water under pressure(120ltr >). G3 also applies to several gas fired storage combi boilers.

 

[static zap]

What’s G3?

A faster way to fill your bath with scalding hot water ,
free of legionella !
( Bring back Nigella + food)