Vaillant ecoTEC Exclusive 838 problem

[Eric]

The boiler temperature is set at 70 degrees but when it fires up for heating it gets to about 45 then shuts down. The flame symbol during heating only shows two bars, out of the four. This is followed by the display of Heating Rem. off time 5 mins. And counts down before firing up again. The rads don’t get hot enough. Any ideas?

 

[king of pipes]

Do you have a remote thermostat what is it set on ?

 

[chris watkins]

Lack of flow rate through boiler, so it not getting the differential across the flow & return, it will then enter anti cycling mode.

 

[Scott_D]

valves closed?
TRVs closed?

Does hot water work properly?

 

[Aire]

Do you have a weather compensator or load compensation thermostat?

 

[Eric]

Do you have a remote thermostat what is it set on ?

Yes, a vsmart and the room is 19 degrees and I’ve set it to 22.

 

[king of pipes]

My advice sit down with the the user manual for the vsmart and study it if your boiler fires and runs it's being switched off by the controls for some reason, or contact valliant customer service they can possibly get someone to talk you through it . Kop

 

[Eric]

Do you have a weather compensator or load compensation thermostat?

No, I don’t have any of those.
[automerge]1569866624[/automerge]

valves closed?
TRVs closed?

Does hot water work properly?

TRVs open and hot water is perfect.

 

[Chalked]

How old is the boiler? And was it commissioned properly.these take a good hour to set and commission. If not done correctly, it will go to comfort mode ( like limp mode on a car)

 

[Eric]

How old is the boiler? And was it commissioned properly.these take a good hour to set and commission. If not done correctly, it will go to comfort mode ( like limp mode on a car)

It was installed in 2011.

 

[king of pipes]

You need a Gsi to attend I would disconnect the vsmart and try the boiler manually you will then know if the vsmart had developed a fault or the boiler is the problem this is not something you can do yourself. Kop

 

[Eric]

You need a Gsi to attend I would disconnect the vsmart and try the boiler manually you will then know if the vsmart had developed a fault or the boiler is the problem this is not something you can do yourself. Kop

Ok thanks for the advice. What’s a Gsi?

 

[king of pipes]

(Gas Safe installer) its against the gas regulation to mess with a gas appliance let someone qualified fix it . Kop

 

[Scott_D]

When was the vsmart added?