Hoping someone can guide me with this one. I went to replace the two way light switches and have come unstuck. In the hallway downstairs I have a two way switch, left switch has a red cable in L1 and black in COM and works fine as this is a single light, right hand side controls upstairs and I have a red, blue and yellow cable free.
Upstairs I have another two way switch, right side has red into COM, another red into COM for the upstairs circuit and red into L1 to control bathroom light which is also working fine. There is a cable from COM right (Bathroom) to COM left (Stairs) and I am then left with the same red, blue and yellow cables as downstairs. I have had the light upstairs switching off and on from the upstairs switch and also doing the the same from the downstairs switch. I come unstuck when the light is switched on downstairs and I try and switch it off upstairs. Feel like I have done every permitation possible so am now asking for help.
Upstairs I have another two way switch, right side has red into COM, another red into COM for the upstairs circuit and red into L1 to control bathroom light which is also working fine. There is a cable from COM right (Bathroom) to COM left (Stairs) and I am then left with the same red, blue and yellow cables as downstairs. I have had the light upstairs switching off and on from the upstairs switch and also doing the the same from the downstairs switch. I come unstuck when the light is switched on downstairs and I try and switch it off upstairs. Feel like I have done every permitation possible so am now asking for help.