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No, I'm still none the wiser. I'm going to get a sparky in.

I realised that when I changed the existing dimmer to the new one I wired it incorrectly. Instead of wiring L1 and COM (wavy line with arrow pointing) I wired L1 and L2 on both dimmers. I have now wired as per the original dimmer and whilst the lights work the arcing noise returned. Have to...

Just typical. I went to record the noise and now it isn't doing it!

I will get as near to the source as possible and will double check the connections. I hadn't considered it might be the bulbs but I'll remove one by one and see if that has any effect. Both my wife and I are convinced it's originating from the ceiling rose but it could equally be very near to it.

Hi John. I wasn't sure of the correct terminology to describe it but someone suggested it was arcing hence I used that. I'll record it later and post here. It's not a buzzing noise but crackling is a better description. The noise increases / decreases if I turn up / down the dimmer yet...

Another suggestion put to me is the transformer connected to the cabinet lights. If the transformer is faulty could this create the issue I'm experiencing? Tomorrow I will check the wiring in the ceiling rose again and try another dimmer switch. I'm still puzzled as to why the new one didn't...

I've now switched the wires around so that the dimmer controlling the spots now controls the cabinet lights and vice versa. Now when I switch on what was the spots dimmer I'm gettig the arcing whereas before I got the arcing when I activated the cabinet dimmer. This now seems that it might be a...

I'm ALIVE! Done that, cabinet lights permanently on but no arcing. What can be concluded from this?

I'll go and try it now. If you don't hear back assume the worse :mrgreen: On 2nd thoughts I'll get my wife to switch it back on :mrgreen:

Do you mean put the live and neutral wires for the cabinet dimmer into the same terminal such as L1?

Here's the replacement and only just realised that my new dimmer is from the same manufacturer.

Many thanks JohnW2. I did take a picture of the dimmer wiring prior to replacing with the new one to ensure that I fitted the wires correctly. See attached. I have not got a picture of the ceiling rose wiring at present as I satisfied myself that the connections were ok. It's too dark to take...

Appreciate all your help but I can's answer loop questions as I just don't know. I really only tackle electrical DIY projects such as light fitting and socket changes providing I can do a like for like swap!! And I always turn the power off. My amatuer analysis of this issue was based on the...

Correct. The noise only occurs when the cabinet lights are on and not the kitchen spots. And the noise occurs / elaborates when I turn the dimmer switch up and down. This also causes the cabinet lights to flicker.

Thanks for the replies / suggestions. I'll recheck the connections but the noise (arcing) doesn't happen when I put the dining room light on. It only occurs when I put the kitchen dimmer switch on for the cabinet lighting and the noise occurs when the dining room light is off. The new dimmer...

I have a double gang dimmer in my kitchen. One of the switches controls the ceiling spotlights and the other controls the under cabinet lighting. Recently, when switching on the dimmer for the cabinet lighting, I noticed an electrical interference type noise coming from the ceiling rose of a...

Wind up? It's going like clockwork :LOL:

You too John, and everyone else here.

Just to bring matters down to my level the replacement transformer arrived today and the Christmas lights are working perfectly. There is no strange noises coming from the transformer. Thanks again for all the help in assuring me that what I was intending to buy was suitable for my needs.

This is the only bit of your reply I actually understood :D Thanks for confirming the suitability.