Vaillant Boiler not warming enough

[ripperuk]

Hi everyone,

I've moved to a property which has a Vaillant Ecotec plus 835. I haven't used the CH as there's been a good period of warm weather. I switched it on yesterday and it warmed up, however even after setting the thermostat to 27C, the max the temp climbed from 18C to 20.5C.

I checked the boiler, but from what I can tell, it is already set to a max of 75C, however after 1.5hrs, it's only managed to climb to 58C. No error codes, nor is the flow-rate of the water very fast.

Is there any setting I need to adjust?

Thank you.

 

[hertsboilers]

Press "i" button to see what is the status code.

 

[dilalio]

5,4,3,2,1...pooomph!
You gotta love the onset of heating season

 

[ripperuk]

I'm sorry hertsboilers, but there is no "i" button that I can see.

Here is the layout:-

Here is the temperature of the Central Heating when the boiler was running earlier:-

 

[MJGas]

Press the 2 buttons together that are linked by the 'i' the top 2 on the left.

 

[ripperuk]

Thank you.

The water pressure is 1.8bars
The status is: No heat demand controller (However this must be because my CH has been off for the last hour)
The information is regarding the serial number etc
There is also an Installer option - When I got into this, the status is 00.

 

[MJGas]

You just leave the installer level alone

 

[ripperuk]

Okay, thanks but may I ask what was the reason I needed to access the "i" menu? What info were you looking for and what do I need to do next?

 

[picasso]

Have the boiler running the central heating only, press the two top buttons and you should see an "s" code, that's it.

 

[ripperuk]

How long should I run the CH for and when should I check for this "S" code? Also what would this mean?

 

[ripperuk]

Right, I turned on the hallway thermostat and the boiler has cycled from s01 to s04, which now says - "Heating Mode: Burner On"

 

[picasso]

Ok wait till it hits 57c and then try the buttons again.

 

[ripperuk]

Okay thank you.

I think I made a mistake regarding the 57C....It actually climbed to 63C with s04. But then suddenly dropped rapidly down. I quickly checked again and the error is s07 - PUMP OVERRUN. Also there is like a Sandtimer icon showing.

 

[Steelmasons]

Go into d.0 , more than likely 'auto' will flag up on display , change auto to manual.

 

[ripperuk]

Thanks steelmasons. I'm sorry, but I'm a novice in this....how do I go into d.0?