Firstly Thanks to everyone. Secondly. I've been up and down stairs all
day and am still no nearer finding the solution. I've logged what
happened at each change and just hope one of you brainboxes can work
out what needs to be done - I admit I'm lost! Please see the diagram
(and find it in your heart to help - please!)
That's a really helpful and clear post - and I was looking forward to the
I can reconcile all but diagram 2. I gather that this results in Landing
sw. controlling lamp, regardless of position of stairs sw. This doesn't
compute with me cos you haven't changed landing connections...
and rewiring stairs sw. doesn't provide a "permanently on" position, which
would be necessary to achieve the result you describe.
For normal 2-way to work, the feed to lamp [effectively] goes into common on
one switch, and the live from mains into common on other switch. If Diag 2
is just as you say, then neither feed nor lamp can be connected to stairs
Interestingly, your original and your diag.4 produce the same result - i.e.
lamp on only when both switches in "on" position - hence two switches are in
Please can you confirm I'm understanding this correctly - and that wires in
stairs sw. in diag 3 and 4 are as orig.
There's almost certainly one (or more) weirdly wired junction boxes hiding
somewhere. And I would be tempted to test that each switch is working
correctly by taking off the switch and checking with a meter (or low voltage
bulb / battery) that each make /
break is working ok.
May be someone else will be along shortly, but so far I'm stumped by
apparently conflicting symptoms. Sorry...
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