Question about Rotary Pass & Seymour / Legrand 90603 600W Incandescent 3-Way Preset On/Off

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Dimmer switch not working

Will switch on or off but will not dim. replaced switch, wired same as the one i replaced. just one black and one red wire . but the new switch just does the same as the one i took off

any ideas please Malcolm


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  • 32 Answers

Are you using a compact florescent bulb? Most of them cannot be dimmed.

Posted on Dec 30, 2008

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mkh5094
  • 145 Answers

SOURCE: 3 way dimmer turns on and off, but does not dim

All your wiring looks good. Many times dimmer just have problems and are faulty. You should note that the dimmer can only handle 600 watts. If you have that or more on it, than you have probably fried the dimming mechanism. In either case the dimming mechanism is not working properly and you will have to take it back and get the same dimmer or a different one. Tell the store they sold you a faulty dimmer and you can get a replacement at no cost.

Posted on May 29, 2010

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The dimmer has no model # on it.


Hi, William

I am going to guess I just answered your first question, about the dimmer getting warm. It gets warm because it puts resistance in front of the load (the lights) in order to lower the voltage and dim the lights.

At a 1580 max rating, you are well over the max load those seven 65 watt lamps draw. Physics and electrical theory dictate the amount of heat the switch will generate, not the Max Load rating. As mentioned in the other answer, Warm is Okay, but HOT is NOT!

Unless the switch is getting HOT, or otherwise "acting funky", you are probably just fine with it. If you decide to replace it, you will be hard-pressed to find one of that rating for a decent price.

As far as how to wire up a replacement, the wiring configuration can vary widely, some will have a white, green, red and black wire, some might have only a white and two blacks or two reds, or like the present one with one red and two blacks. The "trick" is to identify
  1. The LINE (the "hot" wire),
  2. the COMMON (the "neutral" wire),
  3. the LOAD (the "hot" wire that goes to the lights),
  4. and the GROUND (the wire that goes to the earth)
Personally, William - as I said, if it is just "warm", I'd leave it alone. A 1500 watt dimmer switch is a high load switch, and an expensive one at that. Your need (if this is the same William as the earlier question) is only a 500 watt dimmer!

Jan 23, 2015 | Dimmers

1 Answer

Leviton IPI06-1LM 3 way dimmer switch- not dimming


Hi Sara,

Please read this entirely before attempting.

I am an electrician and would like to help you with this problem. You have provided great detail of your situation, yet I am confused about the statement describing how you wired it:

"-Red Wire (used in 3-way installation-tagged) from switch to the red wire in wall."

Before checking wiring, be sure to shut off the power to the circuit.

The "tagged" wire should be the one you identified with tape (when you removed the original) that was connected to the dark colored (called a "shunt" or "common terminal") screw of the switch.

In a 3 way installation, both red wires from the dimmer switch are used. In a single pole installation, only the UNinsulated red wire is used and the insulated wire is not.

To which wire do you affix the "tag"? If it was a short wire that ran between the the bundled black wires and the shunt terminal screw of the old switch, then the dimmer switch's black wire should be combined with these bundled black wires. One of the dimmer switch's red wires would be connected to the red wire in the box and the dimmer switch's last red wire would be connected to the remaining black wire in the box. I understand that this is the way you have it currently wired - but without being able to dim.

If this is all correct, did you check / change the Minimum Brightness Adjustment setting for the switch as detailed in Step 7 of the directions?

"This Dimmer incorporates a
minimum brightness adjustment
that allows you to set the level of
light when the slider control lever is
in the lowest position.
Move slider to the lowest position.
Using a small, insulated screwdriver,
rotate the adjustment screw as
shown until the desired level of
minimum brightness is obtained."

I hope this helps and good luck!

Dec 31, 2012 | Dimmers

1 Answer

Dimmer does not work


A 3-way light switch needs 3 wires for both switches to work correctly. If there is only 2 wires on the switch, its not a 3-way. Only two black wires on the switch means it can be wired either way. The power and light leads are inter changeable. If you really need a 3-way switch, be sure it is labeled as that on the box and look for 3 connections on the switch its self. Else, try a switch rated for a higher amperage.

Nov 30, 2011 | Leviton Rotary Dimmer 6683-i Ivory 3-way...

1 Answer

Two black wires come to original switch. I have wired the dimmer turning the wires around and the switch will not work. What did I do wrong?


If the picture is accurate, I have had the same misfortune with this model. Two wires the same color means its not pole sensitive and can be wired either way. Replace it with a more expensive switch and you should be OK.

Nov 30, 2011 | Leviton Rotary Dimmer 6683-i Ivory 3-way...

1 Answer

I would like to install a Lutron 3 way dimmer switch. The switch has a red, black, green, and white/red striped wires. The previous switch has 2 red and 2 black wires connected to it. The other 2 light...


The circuit you are working on is a 3-location circuit - where two of the devices were 3-way switches, and the remaining device (the one you are trying to replace with a dimmer) is a 4-way switch. Standard dimmers like the one you're using CAN NOT be used to replace a 4-way location. If you wanted to use it to replace either of the 3-way switches, that's no problem - but what you're doing right now will not work.

If you absolutely want to dim the lights from that specific electrical box, my suggestion is to upgrade to a "smart dimmer" where instead of a basic dimmer and two light switches, you have three devices that talk to one another and all dim the lights together.

In terms of your ground wire questions - ground wires certainly aren't necessary to make the whole thing work - rather they're there for safety. Sometimes installers will ground the device by connecting the ground wire to the backbox (assuming its metal) and then rely on the mounting screws on the dimmer or switch to perform the grounding. There are some code rules/exceptions for allowing the device to not be grounded (usually when its in a plastic, non-combustible backbox). If you want to make sure everything is completely up to code (which are usually goverened by local municipalities), you should consult a licensed electrician - but above all else, just use good judgement. Long story short, if the devices weren't grounded before, you can't make it any worse.

Jan 31, 2011 | Leviton Trimatron Rotary Dimmer 6602-i Lot...

1 Answer

Removed standard on/off switch in bedroom. It had a ground attached, in the box there was a white bypass, then had a red and black to on terminal and a red and 2 blacks on the bottom terminal. I want to...


Ok you've had some jack leg electrical work done in your house. The (white bypass) nuetral should be left alone, first you have to figure out which wire is your hot wire (the one bringing the power to the switch) you will need a meter. Take the wires off one screw at a time (you may want to turn off the breaker feeding the switch, its not a bad idea) chack the wires one at a time until you find the hot wire, once you've figured that out tie those wires togrether with the black wire on the dimmer, take the other set and tie those together with the red on the dimmer but with that many wires you're dimming more than one light at a time. If you have anymore questions just let me know

Dec 06, 2010 | Leviton Toggle Touch Dimmer - TGI06-1LB -...

1 Answer

I am replacing an on-off switch, with the 90610-wv dimmer. The instructions says there should be 2 black wires, and possibly a green. The wire in the existing switch has 1 white 1 black, and a bare copper...


The important thing to remember is your switch has two wires.
Sometimes the colors vary a bit because of the specific circuit.
The green wire, when present, is a ground wire, and always connects to bare copper wire.

If your dimmer has two black wires, then connect dimmer-wires to either switch-wire
If the dimmer does not work, simply reverse the two wires.

If your dimmer has a red and black wire, then connect dimmer-black to switch-black, and dimmer-red to switch-white.
Again, if dimmer does not work, reverse the two wires.

Answer back if you have trouble, and I will help.

Oct 25, 2010 | Pass & Seymour Pass Seymour 90610WV 600W...

1 Answer

3 way dimmer turns on and off, but does not dim


All your wiring looks good. Many times dimmer just have problems and are faulty. You should note that the dimmer can only handle 600 watts. If you have that or more on it, than you have probably fried the dimming mechanism. In either case the dimming mechanism is not working properly and you will have to take it back and get the same dimmer or a different one. Tell the store they sold you a faulty dimmer and you can get a replacement at no cost.

May 29, 2010 | Lutron Dvsc-603p Diva 3-way 600w Dvsc603p...

1 Answer

The wall switch that I am replacing, with a 3-way dimmer switch, has 2 black wires, 2 red wires and a green wire. The new 3-way dimmer switch has 2 red wires, 1 black wire and 1 green wire. Question: How...


Ok the RED is Phase and the Black is Neutral... Green is Earth. you have an IN, Red wire, and an OUT Red wire, the rest just go color to color. So in the socket, one Red wire goes to one Red wire from the dimmer, the other Red wire in the socket, goes to the other Red from the dimmer, then Black to Black, and Green to Green. Be careful do NOT work on it live.

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1 Answer

I have a trimatron rotary dimer and i have no clue how to replace it with my other switch. the problem is the other switch only uses 1 black and 1 red wire not 2 black and 1 red plzzz help


If the dimmer has two leads, it is a standard dimmer. One wire brings power into the dimmer, the other lead send "dimmed" power out.
If the dimmer has three leads, it is a 3-way, which is a combination of a dimmer and a 3-way switch. One wire brings power into the dimmer, and the other two leads bring "dimmed" power out - when you cycle the on-off function (by clicking the switch) you are sending the "dimmed" power out one lead or the other. You can use a 3-way dimmer in place of a standard 2-way by simply not using one of the 2 wires coming out of the switch. BUT you must be certain to insulate the end of the lead you aren't using, because when the switch is "OFF", this unused lead will be live. If you are actually trying to wire a 3-way, here's an excellent how-to-- http://www.ehow.com/how_2280970_wire-threeway-dimmer-switch.html Please vote if you found this helpful. Thanks, Al

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