24 Dec - update - Grundfos pump still runs constantly

[Littlemiss21]

“230v 3 wire installation” being live neutral and earth (3 core flex)?
If correct the 24v link hasn’t been removed or the permanent live to boiler has been linked to 240v RT terminal at boiler control board.
Thread is either a wind-up or you’ve been unlucky having nothing but idiots visiting calling themselves engineers.

I promise you this is not a windup!! The 24v link has def been removed.

 

[Grumpy Gasman]

Not a wind-up but no photos forthcoming?

 

[Littlemiss21]

Not a wind-up but no photos forthcoming?

I have posted a video of the live fault on my twitter account for all to see.

 

[Grumpy Gasman]

Post a photo of the cable/flex entering underside of boiler.

 

[Littlemiss21]

Post a photo of the cable/flex entering underside of boiler.

 

[ianmcd]

But it's strange that "All ran fine from 31 October until 7 December, when the same fault came back." That seems to rule out wrongly wired. If it weren't such an intractable problem I'd say it can't be the boiler as the pump run-on is not being used, and it only takes inputs, 240volt to fire. That only leaves the pump, the 2 valves and the room and cylinder stats.

read the whole post about the permanent live being wired into a switched live , that would cause this

 

[fixitflav]

Between what dates?

Quote from OP, #118
"All ran fine from 31 October until 7 December, when the same fault came back."

 

[fixitflav]

read the whole post about the permanent live being wired into a switched live , that would cause this

Not sure which permanent live and switched live you mean,m but presumably it would cause the problem right away, not after 5 weeks.

 

[Grumpy Gasman]

View attachment 155057

As has been asked previously a photo of the wiring centre with cover removed.

 

[dilalio]

As has been asked previously a photo of the wiring centre with cover removed.

Don't you have to be gas safe to do that?

 

[Grumpy Gasman]

Don't you have to be gas safe to do that?

I detect a reluctance from the OP to post a photo of the wiring centre terminals, this was asked previously but maybe the OP missed it?
You would of thought the OP would jump at the chance and post the photo in order to resolve “her” issue.

 

[D_Hailsham]

When the fault is alive and clear, the engineer has traced the fault to a live feed at the orange wire using a multi meter - hence the change of heat actuators.

There are two orange wires - one from each valve.

1. Did the engineer isolate them to check which was providing the 240V?
2. Did the orange wire have 240V on it, even when not connected?

 

[ianmcd]

Not sure which permanent live and switched live you mean,m but presumably it would cause the problem right away, not after 5 weeks.

nope depends on what is and isnt getting used at the time

 

[ReganAndCarter]

Don't you have to be gas safe to do that?

NICEIC, surely?

 

[Grumpy Gasman]

Nothing more than a British Gas bashing thread.