recommendation And advice are welcome.

[Harvest Fields]

Really? What problem are you facing mate?

Hot water cutting out with no fault code or error message.

 

[Old Account]

I believe you to be miss informed here mate.

I spoke to Vaillant a few times back in Germany and we have the same boiler but with less kw. If you scroll down you will see in the description there is clearly written what the boiler is capable off.
Wandheizgerät ecoTEC plus VCI - Produktinfos | Vaillant

However, what size of property is it? Have you spoken to Vaillant yet? For how long is that going on for and is it since the beginning?

 

[Harvest Fields]

I spoke to Vaillant a few times back in Germany and we have the same boiler but with less kw. If you scroll down you will see in the description there is clearly written what the boiler is capable off.
Wandheizgerät ecoTEC plus VCI - Produktinfos | Vaillant

But that isn’t what you said mate. You referenced to the storage vessels. They are not 20 litres. They are 15 between them. The 20ltrs refers to the possible flow rate.

 

[Harvest Fields]

Boiler 3 years old. 4 bed 1 bath 1 shower. Yes to Vaillant who can only offer possibilities and about 6 months.

 

[Old Account]

Boiler 3 years old. 4 bed 1 bath 1 shower. Yes to Vaillant who can only offer possibilities and about 6 months.

But the boiler should be under a certain warranty and therefore Vaillant could come out to access the job.

 

[Harvest Fields]

But the boiler should be under a certain warranty and therefore Vaillant could come out to access the job.

To do what?? They have said unless there is a fault occuring the job is chargeable and mg customers first point of call should always be me.

 

[Old Account]

To do what?? They have said unless there is a fault occuring the job is chargeable and mg customers first point of call should always be me.

That’s weird with being charged though. If you already have paid for warranty that should be all covered. There is clearly an issue with the boiler ... have you checked the pump at the back for the cylinder ? That’s one of the faults which is quite common. It’s a little bit awkward to get to but you should be able to check that.

 

[Old Account]

I believe it’s called shunt pump

 

[Scott_D]

What’s your experience with storage combi boilers? Have you fitted some before to multiple bathrooms?

No but once the 20 litres of stored hot water has gone it’s just a Vaillant 838 Combi so about 15 lpm of hot water available

 

[Harvest Fields]

When I am there it all looks like it is doing what it is supposed to mate. Only happens about once every 2 weeks