Combi boiler intermittent water leak

[utterlydiy]

My daughter has Valiant turbomax VUW 242/282 combi boiler.

Intermittently she finds a water leak on the floor and notes the pressure at zero.

Then if she repressures the system. The leak may not reappear for awhile.

I had a look and could see nothing.

It appears the front control panel is hinged, does it hinge down and hows its fixed. In other words how do you move the panel to access to view all the valves etc.

Thanks

 

[endecotp]

Where does the pressure relief valve vent to? Does it just empty onto the floor, rather than out through the wall?

How does the pressure gauge behave? Does it go up a lot when the boiler is on?

 

[utterlydiy]

thanks,

How do you move the control panel to access the view of the valves and etc. better, to find where or if any pipework is there for a drain from the relief valve.

 

[Justin Passing]

If you have the 242 with black panel and green knobs there's a single screw then it hinges down. The later grey panel one has two quarter-turn fasteners with slots like screws. Not hard - the manuals are online at Vaillant.
The panel underneath shouldn't be hard to remove for inspection - it's often missing.

Yes there should be a pipe on the pressure relief valve, going to outside, usually then turned down or back to the wall.

If the pressure relief has been passing water it's likely to keep leaking. The press vessel is likely to need recharging too. Probably best to call a boiler man especially if it hasn't been serviced recently.

 

[ScottishGasMan]

If you have to ask then I wouldnt be touching a gas boiler If I was you. When she fills it back to 1 or 1.5bar, then turns the heating on how high does the pressure go when hot? If its leaking from inside the boiler then it might be an Idea to just call someone to have a look.