Boiler keeps on boiling water even heating is switched off

[luckyvictor]

Now I have removed the suspected orange wire, and turn back power on from fuse box, but there is no light on the wilo pump, and I turn on my ideal boiler and it just stays at zero...

What have I done wrong? So far I have only removed the orange from box and open the housing of the two valves...

 

[Deleted member 120897]

So how may I probe at the orange wire at MV? I dont see any point that I can touch.

Apologies, there doesn’t appear to be a point you can touch, was thinking of a Drayton valve. Looks like you’ll have to do a live voltage test or remove the grey wire for the corresponding valve at wc and test between these, if you have continuity then it’s closed circuit and faulty.

 

[John.g]

You don't probe it at the m.valve, follow the black cable back to the junction box or wiring center, on of the wires fom the cable will be orange, remove it

 

[luckyvictor]

You don't probe it at the m.valve, follow the black cable back to the junction box or wiring center, on of the wires fom the cable will be orange, remove it

Removed it now, turn back from fuse box, but no power is seen...

 

[John.g]

There is a blue wire in that box which is a neutral, probe with red meter lead on the orange wire and the black meter cable on the terminal screw where the blue wire is, meter set to 500/600v AC.

 

[luckyvictor]

There is a blue wire in that box which is a neutral, probe with red meter lead on the orange wire and the black meter cable on the terminal screw where the blue wire is, meter set to 500/600v AC.

I tried the above, got nothing, I don't seem to have any power even though I switched back from the fuse box...

You can see from the photo there is no green light on the wilo pump...

Is there any other switch in the system?

 

[John.g]

Removed it now, turn back from fuse box, but no power is seen...

OK just touch the orange wire to the terminal screw where you removed it does boiler/pump fire up, power on but programmer off

 

[Deleted member 120897]

Did you put any demands on?

 

[luckyvictor]

OK just touch the orange wire to the terminal screw where you removed it does boiler/pump fire up, power on but programmer off

Yes yes yes, you are right, if I touch it, then power is back on！！！

 

[John.g]

There should be nothing on apart from power as we are trying to determine.ine if the end switch is still made on the suspect m valve