Dimmer switch turns on lights but does not dim

[markopolouk]

Our old dimmer switch was buzzing and the led's in the chandelier were flickering so I decided to change it with a new compatible one. But after installing it and using the same wiring method as the exsiting one it would only turn the lights on or off and not dim them, flickering has gone however.

The house is quite old and there is only one light switch in the room.

I have attached photos of the old dimmer wiring and the new one. Basically the 2 reds go into L2 and the yellow goes into the common terminal. I have tried the 2 reds in L1 and L2 but neither dim. I also tried another switch just in case it was faulty but got the same result.

Max rating is 100W and we only have 5x5w LED's in the chandalier. You can't see in the photo but the blue and black wires behind are connected together.

If anyone has any ideas, thanks in advance.

 

[DefyG]

If the 5 lamps are definitely dimmable, I can only assume a faulty unit, as termination is correct.
A non-dimmable lamp may damage a dimmer module.

The back box looks a bit on shallow side for that dimmer!

 

[littlespark]

While we’re at it, the metal faceplate needs earthed, and a through crimp isn’t suitable for non-stranded cables.

Can the lamps in the chandelier be removed and replace one with a traditional filement lamp?
That will prove the dimmer works, and the fault lies with the led lamps

 

[mainline]

through crimp isn’t suitable for non-stranded cables.

Correctly selected and installed crimps are reliable and durable

 

[Jock from the north]

If the 5 lamps are definitely dimmable, I can only assume a faulty unit, as termination is correct.
A non-dimmable lamp may damage a dimmer module.

The back box looks a bit on shallow side for that dimmer!

That must be some tight squeeze ,box looks 25mm at best ,I suppose the plasters adding another 10mm maybe

 

[Jock from the north]

Correctly selected and installed crimps are reliable and durable

When we did a police station in aberdeen we had to crimp cables inside galv trunking we used heat shrink over every crimp or rather was made to by clerk of works it was stranded singles you could pull on it till cable snapped .the ideal push fits seem to be perfect for solid cores .

 

[Jock from the north]

Our old dimmer switch was buzzing and the led's in the chandelier were flickering so I decided to change it with a new compatible one. But after installing it and using the same wiring method as the exsiting one it would only turn the lights on or off and not dim them, flickering has gone however.

The house is quite old and there is only one light switch in the room.

I have attached photos of the old dimmer wiring and the new one. Basically the 2 reds go into L2 and the yellow goes into the common terminal. I have tried the 2 reds in L1 and L2 but neither dim. I also tried another switch just in case it was faulty but got the same result.

Max rating is 100W and we only have 5x5w LED's in the chandalier. You can't see in the photo but the blue and black wires behind are connected together.

If anyone has any ideas, thanks in advance.

View attachment 119356