Help with 2 gang 2 way light switch

Chippymark

Chippymark

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Hi all.
Apologies for the novice question...
I've changed many single light switches in the past but today I have tried to replace my dual light switch in my hallway.
The light can be controlled by switches upstairs and downstairs.
I took a picture of the before switch and I've directly transferred to the new switch.
Com-Com
A1-L1
A2-L2
B2-L2
However the light is no longer controllable by the downstairs swith (the one I've not changed)
The upstairs switch.(The replacement) will switch the light on and off and controls the loft light..
Why has my link been broken between downstairs and upstairs..
Any assist ?
I've took a picture of the old switch wired and the new switch is only representative as obviously the one I wired up is 2 gang not 3 gang.
Any help much appreciated
Cheers
Mark
 

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You may have mixed up the red insulated conductors in com and L1,have you tried swapping them over ?
Is the loft light working as normal ?
 
terryplumb said:
You may have mixed up the red insulated conductors in com and L1,have you tried swapping them over ?
Is the loft light working as normal ?
Click to expand...

I clearly labelled each wire and transferred to what I believe was the same in new switch
Com to com, a1 to L1 etc.
Loft light works ok..
Cheers
 
Chippymark said:
I've changed many single light switches in the past but today I have tried to replace my dual light switch in my hallway.
The light can be controlled by switches upstairs and downstairs.
I took a picture of the before switch and I've directly transferred to the new switch.
Com-Com
A1-L1
A2-L2
B2-L2
However the light is no longer controllable by the downstairs swith (the one I've not changed)
The upstairs switch.(The replacement) will switch the light on and off and controls the loft light..
Why has my link been broken between downstairs and upstairs..
Any assist ?
I've took a picture of the old switch wired and the new switch is only representative as obviously the one I wired up is 2 gang not 3 gang.
Click to expand...
You wrote
"However the light is no longer controllable by the downstairs switch (the one I've not changed)
The upstairs switch.(The replacement) will switch the light on and off and controls the loft light."
By this, it seems that you may mean that the light IS controllable by the upstairs switch if (and only if) the downstairs switch is in one of the two possible positions.

If this is the case it is probable that "You have mixed up (reversed) the red insulated conductors going to Com and L1." - to paraphrase terryplumb
 
Guys... you lot are amazing... thank you ..
Com1 and L1 needed swapping over.. all now works as it should.
I even fitted the 3 gang 3 switch downstairs with no trauma...
Cheers peeps
 
Your new switch plates are metal ,have you connected the earth conductors to the earth terminal on the back of the switch plate ?
 
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