Vaillant EcoTEC plus 831 pressure keeps rising

[muggles]

Which should be removed after the system has been filled. Removing it will ensure that no more water can get into the heating system even if the valves are letting by when shut.

You've never tried to remove a filling loop on an Ecotec, have you?

 

[bernardgreen]

You've never tried to remove a filling loop on an Ecotec, have you?

From that I assume it is a non removable piece of pipe. What ever happened to the sensible requirement for flexible removable filling loops. Or is there now implicit trust in valves to prevent CH water getting back into the nains supply ?.

 

[John D v2.0]

You've never tried to remove a filling loop on an Ecotec, have you?

Must depend on the model. Our ecotec pro has standard filing loop, I know that because I had to change it because it was leaking from the spindle.

Maybe the op problem is that there are two filing mechanisms and one is letting by?

 

[Gasguru]

Both loop valves are appalling quality..I replaced many and they often only last 18 months before letting by again. You're best off capping the valves and fitting an external loop (and disconnecting the hose)

 

[As2215]

I have just spoken to the engineer who called Vaillant technical who told him he has done everything they would expect to solve the problem. The firm are now paying Vaillant to come out on Friday and hopefully resolve the problem!

 

[muggles]

From that I assume it is a non removable piece of pipe. What ever happened to the sensible requirement for flexible removable filling loops. Or is there now implicit trust in valves to prevent CH water getting back into the nains supply ?.

It is technically removable, but you need child-sized fingers to actually get to it

 

[muggles]

Must depend on the model. Our ecotec pro has standard filing loop, I know that because I had to change it because it was leaking from the spindle.

Maybe the op problem is that there are two filing mechanisms and one is letting by?

Yes, the pro is the no-frills bargain basement version of the Ecotec, and needs an external filling loop. The Plus has one built in to the isolation valves

 

[gazdaz36]

Part no 0020010295 and 0020010291 are what you need to fix it

 

[deetapp]

op, did you get the issue fixed?
My boiler (same model) has started doing something similar.

 

[As2215]

Yes Vaillant came out and sorted the problem. It was the filling loop and the noise was from diverter valve. Engineer changed both and since then had no problems at all.

 

[deetapp]

Great, thanks