Replacing a 2 way switch with a 2 way dimmer

[iainmck]

Old 2 way switch has 2 red wires connected to terminal 1, 1 connect to the common terminal and 3 black wires which don’t really go anywhere. New dimmer switch has L1, L2 and ~ arrow.

Grateful if someone would confirm how new dimmer switch should be connected.

 

[WabbitPoo]

There is a sticky note at the top of this forum which describes this. Take a look then come back if it makes no sense (though, think twice about doing it if it makes no sense at all)

 

[sparkyspike]

Assuming nothing is connected to L2 on your old switch:
Connect the red wire (from COM) onto the ~ on the dimmer
Connect the other red wire (from L1) onto L1 on the dimmer
Leave the black wires in their terminal as they are neutrals.

 

[ban-all-sheds]

Old 2 way switch has 2 red wires connected to terminal 1, 1 connect to the common terminal.

I wonder how that works as a 2-way switch.....