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Lights can be turned off and on but not dimming. I felt the wall plate was hot to the touch. The dimmer was working until bulbs were replaced.

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If your wallplate is hot, that is a sign of trouble, and possible electrical fire. That dimmer is not made for the load, or it is going bad.

Turn off the dimmer immediately. Do not use the dimmer at all. Replace with a wall switch until you have the correct dimmer.

Each dimmer is rated for Watts. Ordinary electrical switch is rated by amps. Ordinary 15 Amp electrical switch can handle up to 1400 Watts. This means 14 - 100 watt bulbs.

Dimmers are usually not rated for 1400 Watts. They have 500-600 Watt rating. Look at the side of your dimmer for Wattage information that is usually printed on dimmer.

Heavier-duty dimmers cost more and can carry more wattage. Some dimmers carry up to 1800 watts. These kinds of dimmers have aluminum heat sink visible right on the face of dimmer.

In any case, your dimmer is an electrical fire hazard and should be replaced. Add up total wattage of your lights, and read new dimmer package when buying.

Up-vote if this information is helpful. Thanks for the feedback.

Posted on Oct 15, 2010


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The dimmer runs seven reccesed lights with 65 watt bulbs in them. Also the other wire that comes in powers other switches in the kitchen. But the dimmer does only seven can lights. But gets warm as I

Yes, Wall Dimmer Switches do indeed get warm in use. The front part of the dimmer switch is a plate of aluminum, and is actually a "heat sink" for the innards. It dumps the heat to the outside front of the switch, and yes - it makes the switch-plate feel warm hen the dimmer is used.

The concern here is warm is okay, but HOT is NOT, at least not for your application of only a few lamps being dimmed.

If you are ever in a commercial establishment, like a big convention hall in a hotel, or a large restaurant dining room where a lot of lights are on single dimmer switches, you will observe the switches actually have external heat sinks, large plates of finned metal, on the outside of the switch. Those are designed to dim many lights, and can indeed get quite hot.

Take the plastic plate off and read the wattage rating that is stamped into that aluminum plate. As long as the total of your load (7 lamps times 65 watts each lamp equals 455 watts total load) is equal to or less than the "Maximum Load" shown on the switch, you are fine.

If you still feel the switch is too hot for your peace of mind, replace it with one rated for an even greater load - it will possibly run a bit cooler (Ohm's law says it will not!). Switches can and do wear out, and they are inexpensive enough that replacement is "cheap insurance".

If you go that route, and decide to replace the switch yourself (a relatively easy task, Google yourself a "How-to" video on the subject) and unless you are very VERY familiar with the circuitry in your home, just go ahead and throw the Main Breaker of the house off for the 15 or 20 minutes the job will take you.

That way, you won't have any 'shocking surprises' when you start fiddling inside that switch-box.

(make sure you have fresh batteries in your best flashlight, and all the tools you need, before you start!)

Best 'o luck, William!

Jan 23, 2015 | Electrical Supplies

1 Answer

Dimmer switch legrand 735446 not working after bulb blew. Always on, never off or dimmed

Yes, replace it. But once you have it removed, you might want to check it with a resistance meter to confirm that the problem is the switch and not a wiring problem. If the switch gives virtually zero resistance in any position, then this is definitely the problem. The actual source of the problem might be that it's getting a bit hot in the block of 8, especially if they are all dimmers. If the wall plate tends to feel hot you might want to replace some of them with regular switches. Better that than burning the place down.

Feb 09, 2013 | Electrical Supplies

1 Answer

I changed the light bulbs in the fixture it controls, now it does not work. What is wrong?

This switch is designed to dim incandescent lamps. It has nothing in its description about being used with CFL (compact fluorescent lamps) types. If you are attempting to dim standard CFL types, it will not work.

CFL's are available in both dim-able and standard types. As you may have guessed, only those marked as "dim-able" will work with a dimmer switch. Dim-able CFLs cost slightly more than standard CFLs but may be controlled by any switch. Dimmer switches may only control incandescent and other type lamps that specifically state they are compatible with dimmer switches.

If you are attempting to dim incandescent lamps, make sure that you are not trying to dim lamps with a total wattage greater than the dimmer can handle. Most dimmer switches are rated for 600 watts, if you have two dimmer switches under one wall plate, the wattage rating drops to about 500 watts. This de-rating is because of the heat the switches create. There are dimmer switches that can dim more than 600 watts, but the price skyrockets for a 1000 watt dimmer, and keeps climbing.

If your wattage is within the limits of the dimmer, check the bulbs. If they are ok, the dimmer may have failed and require replacement.

If you found my reply helpful, please rate it "4 thumbs up". Good luck & thanks!

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Power is on the T603WV. Most switches turn on when flipped up, this one you must press down to turn on. The light does NOT dim. I think it must be reversed. Please help. Wires were not identified as Hot...

As for the direction, just remove the cover plate, remove the 2 hold down screws, and flip the switch over.
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If the legrand dimmer 400w - pro21 can function with led dimmable light "philips master led spot "

The answer is NO. You need a Trailing Edge dimmer to control LEDs.

The Phillips master LED spot manual says
Lighting controls: bulbs are dimmable 20-100% with ""select"" Trailing Edge RC devices

The Legrand pro21 manual does not say anything about being a Trailing edge dimmer.

Legrand diagrams show what appears to be incandescent bulbs, and say nothing about LEDs

LEDs cannot be dimmed as ordinary incandescent (tungsten) bulb.

More reading:
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TG106 does not work with plastic wall plate installed. I can take the wall plate off and it works fine.

Hello. Turn off the power to this switch. Remove the plate and then take out the dimmer switch. Check each of the wire connections. Make sure each one is tight and that there is not too much bare wire exposed outside of the actual connection. Reinstall the dimmer making sure that it is tightly connected to the box. Replace the plate and turn the power back on. IF you still have a problem there may be a sensitive fault inside of the dimmer switch so replace the switch. Joe
please mark this answer as very helpful thanks.

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Light flickers when dimmer switch isn't ''just right''

Compact fluorescent bulbs do not work on dimmers.  You have to use standard incandescent bulbs or not dim the lights.

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Humming inside the switch

Is it connected to a fan motor also? - most dimmers are for lights only - if there is a ceiling fan connected you may experience a humming sound from the dimmer

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