One gang (left) of my 2 gang Lightwave Light Switch has suddenly stopped working. The right gang works fine.
If I try to power the ceiling light on, the amber LED flashes to blue for a split second and then returns to amber. The right gang works fine. It won’t turn on at the switch or via the wifi link/app.
Is this a faulty unit? I can’t find any error messaging online or on any forums about not switching on.
Can you tell us what loading is on each side (gang) of the dimmer?
How many bulbs, what type (GU10s?), rating (wattage) and make/model?
I take it that before today it was working ok, then stopped?
Thanks for replying.
Both sides have the same model light, it’s an open plan room with a light either end. They are Next ceiling halogen lights. 10 x 10W halogen G4 bulbs (100W) load.
Worked perfectly beforehand, although occasionally it dimmed slightly and made a slight buzzing noise when turning on. If the light itself was faulty, I’d assume the light switch would still turn on – just the light would fail to turn on?
To help trouble shoot it, I’d try changing back to a normal switch or dimmer just to rule out a failure for example in the halogen transformer. (Silly question perhaps, but these halogens were dimmable before you put the lightwaverf switch in? – not all halogen transformers are)
I’ve had the same issues. I also have 12 Megaman 6v bulbs so the load should be ok. It feels the switch has just failed suddenly. Second time in a week on a different light. This is frustrating now.
First post here but possibly an identical issue.
I have been through 2 x LW420WH 2 gang dimmers where the right side failed, would not switch on, reset power and then dead completely. All bulbs checked OK. Last night the 3rd switch died on the left hand side.. had a ding dong with wife about the cost.. but now its simply a matter of principle to get this working…
Each side has 10 x Gu10′s. All LED. Initially I had a mix of 7W Megaman and 5W Luceco (from Mapplin) on both sides, all dimmable, all working perfectly, no buzzing or flickering. First switch failed on right hand side, replaced, all OK for about 2 months then 2nd switch failed, right hand side again.
For the 3rd switch, as a process of elimination, I replaced all 20x bulbs with Megaman 5W LED Dimmables (141322) from here..
and got the replacement LW420 switch from thse guys too
Worked perfectly for a week, last night the left hand side stopped working. switch looked like it was working but lights wouldn’t come on, reset power and its now dead on the left. Put a normal switch back in and all bulbs OK.
I’m a bit lost now.. cant afford to keep blowing cash on these switches for them to fail weeks later. Do I split the switch into 2x LW400′s ?
All advice appreciated.
. . . I’m a bit lost now.. cant afford to keep blowing cash on these switches for them to fail weeks later. Do I split the switch into 2x LW400′s ?
All advice appreciated.
They have a 2 year manufacturer warranty so you shouldn’t need to blow cash on replacements.
It might be worthwhile getting a qualified electrician to test your electrics, but note that if those tests include an insulation resistance test, all LightwaveRF products must be disconnected from the mains first, or damage will occur.My Mazda CX-3 Blog: jtonline.info
Thanks for reply jtonline,
What would an insulation resistance test indicate? bad wiring?
I will try RMA ~ has anyone successfully RMA’d an LW product? Now I have three, I could keep returning them and always have 2 spare!.. for 2 years at least.
Does anyone else have a successful setup with LW420 with 8+ bulbs on each gang? IF so let me know, and what bulbs you are using etc..
. . . What would an insulation resistance test indicate? bad wiring? . . .
It’s just one of a range of tests an electrician would carry out if asked to do an electrical installation inspection and test. It involves shoving 500V dc through the wiring. See http://www.sparkyfacts.co.uk/Inspection-and-Testing-Insulation-Resistance-Test.phpMy Mazda CX-3 Blog: jtonline.info
From the compatibility guidelines I would say it’s possible you all may be exceeding the max wattage
LED/CFL Lighting Compatibility Guide
LED lighting is quickly becoming a popular solution for people looking to reduce their energy
consumption. However, many LED lights can have difficulty when dimming. LightwaveRF
Dimmer switches can work with LEDs if the LEDs are labeled dimmable, but there are
guidelines that need to be followed:
IMPORTANT – An LED load is not the same as a standard load and must be treated differently.
Although the Dimmer switches can handle 250/210W of halogen/incandescent load, this is
not the case for LED lighting.
Maximum Loading: The maximum recommended LED load of when used with dimmers varies
across the market; a common guideline is not to go beyond 10% of the maximum halogen
rating of the dimmer switch. However, there is no specific rule as the many LEDs on the
market have their own traits. Using 10x 5W LEDs from Brand A can give vastly different results
from using 5x 10W LEDs from Brand B, despite both totaling 50W of load.
As a guide, we would not recommend going above 60W of LED lighting per gang on
LightwaveRF Dimmer switches. Exceeding this may lead to damage of the LightwaveRF
Dimmer switch. Some LEDs may appear to work initially with >60W loading, but this may
cause damage to the Dimmer switch over time.
Hi NodeZero, Yes I’ve seen this guide. problem is that its vague.. this guide is from 2013, only mentions the LW200 series and I think pre-dates the LW400 series? Even so, I have 10 x 5W Megaman LED bulbs on each gang, 20 total and thats 10W less than the recommendation per gang. Lastly, I would hope, decent Megaman LED’s + LWRF400 series = happy.
Have raised a ticket with LWRF support see what they say and see about RMA.
Still keen to know if anyone else has a similar (yet successful) setup
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