If it did come out you would have a flood. But its under pressure all the time from boiler system pressure. So wont come out unless you unclip it from the sides.

Yes sure you can

However when in heating mode it doesn't drip

Just unlucky. Probable just needs new seals. That does mean removing the whole Valve.

Hi Mark just a quick update.i was told I needed a new back plate.so I went and got 2 o rings at£3.74.and Did it myself whilst cooking Sunday dinner.and yes it was fab .and fix the leek.

I was just about to write the same thing ,after watching some of his videos offering poor advice, no way should any gas safe engineer be endorsing a DIYer to be removing the case of a balanced flue appliance, absolutely clueless !

@@NeilRidley1 absolutely crazy!! And another video showing people how to “fix” and F76 fault by just changing the thermal fuse instead of the complete heat exchanger!! This guy is dangerous!!

kzfaq.info/get/bejne/gtBlh9So392UpYE.html&t

Can I take the case off my gas appliance? It depends on whether the case is purely decorative or whether it is an integral part of the appliance. Decorative casing: These cases can usually be removed by the consumer e.g. can be lifted off or are hinged panels and do not need to be unscrewed. A decorative case can be removed safely by the consumer or anybody else remembering to follow any manufacturer's instructions and warning labels and making sure you have safely isolated any electrical parts. However, if you are in any doubt, always use a Gas Safe registered engineer. Integral casing: Many appliances have cases, which in addition to being decorative, function as a part of the combustion circuit and form an important seal around the gas carrying components e.g. burner, combustion chamber, gas valve etc. If removing the case involves undoing a number of screws, this normally means it is a functional case and it should not be removed by the consumer or a person who is not Gas Safe registered.

In the case of these vaillant /gloworm /heatline shared architecture boilers, the front cover is purely decorative and not sealed at all. This valve is a weak point and well within the realms of DIYer capabilities, also it's not near any gas, combustion or pressure parts. People are generally smart enough to leave the "explody" bits to the professionals and handle basic maintenance of wear and tear items like these themselves - whatever the law or regs say. That's the reality.

@@TheBadoctopus your as clueless as this muppet if you believe the front cover of a vaillant ecotec does not form part of the case seal and if you are gas safe registered it’s time you resit your ACS

@@TheBadoctopus no you’re completely wrong, if you look on page 10 and 11 of valiants part list, item number 7 is the called the cover, that’s the front panel swing arm which covers the controls, this you are allowed to change yourself as a diy’er, but to remove the whole front panel you need to be gas safe registered as inside it’s covered in a foam seal, that front panel is part of the burner assembly because it’s a negative pressure flue if you look at the black plastic air duct inside it’s attached to the fan and that’s on the gas valve, negative pressure flues push the products of combustion out of the flue which in turn draws air in from outside into the boiler itself not directly into the burner that’s why if I stabbed a hole into the case with a screwdriver your boiler would be categorised as AR “at risk of causing damage to life” that’s why rubber grommets missing on wires in are classed as AR too

@@TheBadoctopus