Well , here are some obvious facts too :
1) this is a DIY site, not a 'tell them they are breaking "Part L builldings regs" site.
2) Part L Building regs probably only applies in your 'unspecified country', not necessary where most of the readers live (so at least try to be more precise about...
Yes you are right : best to have the installer do this.
Except of course that they ARE essential when you need them to turn your central heating on (turning it off is less essential because you can always pull the plug, I suppose)!
And when you don't really fancy living in a cold house for...
Also note that you may not have to open up your thing at all once you have the knobs : just insert the knew knobs and push them in. A little extra force will be needed at the end for them to click firmly in place.
This would however mean that the broken off stems remain inside, they are plastic...
Ok. I can help you now :)
First off, I send an email to Vaillant telling him that I had this issue after I found out that the part you need is 1117319 (which are actually 3 knobs in a plastic bag, 2 big ones and one small one, the ones that are on the front panel).
They send me the part for...
Both knobs came off 2 days ago. (Vaillant eco Plus 296)
Bad-knob day.
So now I'm stuck, the people who installed them say that I should be able to just 'click' it back in place but this is absolutely not the case and I have no idea what mechanism kept it in place so I can not 'reason' how to...
Just a picture of the Vaillant 296 that I have.<br>The knobs broke off and now the 2000$ apparatus is essentially useless because of 5$ knobs being defect.