Vaillant boiler code S7

[Becky1w]

free flow system vaillant boiler is displaying a code meaning pump over run could anyone tell me how to fix it plz

 

[Dan Robinson]

Huh?

 

[ianmcd]

what is a free flow boiler ???

 

[Becky1w]

Tank in the loft boiler downstairs not a combi

 

[Becky1w]

Hi I've got a free flow system the heating won't come on and the boiler attempts to fire up it says code s. 7 anyone know how I can fix this please

 

[jackthom]

Does the boiler fire up at all and the temperature display start to rise?

 

[Becky1w]

Yes it fires up and starts rising cuts out at around 70

 

[Dan Robinson]

Poor circulation. What does and doesn't work? You've given very little useful information.

Hot water ok?

 

[Becky1w]

It's a free flow system with a vaillant ecotec plus boiler (condenser) it displays an error code s. 7 which means pump over run

 

[Dan Robinson]

What the hell is a free flow system?

Do you mean open vented heating, gravity hot water?

S plan? Y plan?

 

[Dan Robinson]

And it's not an error code. It is a status code.

 

[Becky1w]

Yeah gravity fed not a combi the tank is in the loft, don't know what s plan or y plan means

 

[ianmcd]

you have an open vented system not a free flow as you call it and s codes are not fault codes they are simply telling you what the boiler is doing

 

[jackthom]

S7 just means the pump is still running for a few extra minutes after the boiler has finished firing to carry off the heat from the boiler.

Does it get to 70 in a very short time and what sort of motorised valves are in the system?

Some of these

Untitled

• jackthom
• 4 Nov 2011
• 5

or one of these

Untitled

• jackthom
• 19 Dec 2008
• 18

 

[Becky1w]

That's all it says it tries to heat up and cuts out at 70-80 in a short time the valve still works