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Did I break my dimmer knob?

I have an old rotary dimmer knob (not sure which kind). I didn't know that the knobs just pull off, so I tried to push in and twist. The light turned off, but now it won't turn back on. Should I just replace it?

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  • Master
  • 2,113 Answers

You can get the knobs separately if you look. First check if the knob was a half circle or a serrated style, i think the replacements have an adapter to fit either style.

Posted on Nov 21, 2013

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Posted on Jan 02, 2017

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  • 122 Answers

SOURCE: 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

Posted on Nov 23, 2008

  • 22 Answers

SOURCE: replace dimmer switch with toggle

Both wires should be black because the switch interrupts or breaks the connection to the light. It doesn't matter which black wire goes where. Just be sure the power is OFF and then undo the dimmer switch (usually has wire nuts connecting the black leads) and then connect the wires to the new toggle switch.

Turn on the power and feel good about your work!

Posted on Jul 24, 2009

VtToolMan
  • 704 Answers

SOURCE: wiring dimmer to knob and tube

You should attach the green grounding wire to the metal box using a green grounding screw. You don't want to leave the wire loose, as any contact with the switch screws could cause a short.

Also, you should wrap the switch with at least 2-3 complete wraps of electrical tape to prevent the screws from contacting the sides of the wall box.

As a side note, you should likely have a complete check done on your house if you still have knob and tube wiring installed, as the dangers associated with this very old wiring are many. Typically, older K&T wiring was used in homes well over 60 years ago and houses then only had minimal electric current drawing devices, such as lights and a couple of other small appliance devices (toasters, coffee pot, TV and radio, etc.)

The problem with older homes with K&T wiring still in use, is that the circuits can be easily overloaded with modern electric convinences and lead to a possible fire situation, especially since there is no dedicated ground to help mitigate short circuits, etc. Also, the rubber based insulation used on this type of wiring deteriorates after 40 years (+/-) and rodents tend to chew on exposed wires in attics and crawl spaces.

I don't wish to alarm anyone, but as a Licensed Master Electrician, I've seen and done my share of repair work involving Knob & Tube wiring and even had a couple of homes that had a mix of it and other, newer wiring, that I've completely rewired. Many states require K&N wiring be replaced before a home can be sold, so getting a jump on it will make your home safer and better suited to operate all the devices that people tend to have, in today's society.

Hope you find this Very Helpful and best regards!

Posted on Sep 10, 2009

  • 107 Answers

SOURCE: Lutron Glyder Slide Dimmer GL-603P (new dimmer

Sadly, yes, it just sounds like the switch got stuck. You should be able to yank that knob off and try to manually unlatch it with something thin and long (like a pencil) - just, do me a favor, and make sure whatever you use isn't conductive, there shouldn't be any exposed electrically, but just be safe about it.

If that doesn't work, call their tech support center at 1-800-523-9466 - they will most likely replace it for you.

Posted on Oct 13, 2010

SOURCE: My rotary dimmer doesn't switch 3-ways. I have to

You posted under Leviton rotary dimmer.
Lutron and Leviton have many 3-way dimmer styles, and both make 3-way rotary dimmers.

I remember years ago replacing 3-way switches with dimmers and having same experience as you. One dimmer has to be ON for the other dimmer to dim.

Later I learned when you replace both 3-way switches with dimmers, you buy a control-and-companion dimmer set. One dimmer is main, and it lets you dim from both locations. The two dimmers communicate with each other electronically. Buy these dimmers at lighting store that specializes in fixtures and dimmers. Ask for most experienced salesperson.

I checked to see if rotary dimmers are made in the companion set. And neither Leviton or Lutron show 3-way companion set rotary dimmers.

1) Leviton spec sheet on rotary 3-way dimmers does not show companion dimmer. This indicates that Leviton rotary dimmers don't have capability of communicating with each other.

2) Lutron has image of 3-way rotary dimmers.
Image shows single rotary dimmer in 3-way & 4-way circuit.
This tells me that Lutron does not have companion dimmer for 3-way rotary dimmer.
geno_3245_123.jpg

Posted on Dec 01, 2010

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Wiring dimmer to knob and tube


You should attach the green grounding wire to the metal box using a green grounding screw. You don't want to leave the wire loose, as any contact with the switch screws could cause a short.

Also, you should wrap the switch with at least 2-3 complete wraps of electrical tape to prevent the screws from contacting the sides of the wall box.

As a side note, you should likely have a complete check done on your house if you still have knob and tube wiring installed, as the dangers associated with this very old wiring are many. Typically, older K&T wiring was used in homes well over 60 years ago and houses then only had minimal electric current drawing devices, such as lights and a couple of other small appliance devices (toasters, coffee pot, TV and radio, etc.)

The problem with older homes with K&T wiring still in use, is that the circuits can be easily overloaded with modern electric convinences and lead to a possible fire situation, especially since there is no dedicated ground to help mitigate short circuits, etc. Also, the rubber based insulation used on this type of wiring deteriorates after 40 years (+/-) and rodents tend to chew on exposed wires in attics and crawl spaces.

I don't wish to alarm anyone, but as a Licensed Master Electrician, I've seen and done my share of repair work involving Knob & Tube wiring and even had a couple of homes that had a mix of it and other, newer wiring, that I've completely rewired. Many states require K&N wiring be replaced before a home can be sold, so getting a jump on it will make your home safer and better suited to operate all the devices that people tend to have, in today's society.

Hope you find this Very Helpful and best regards!

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Turn on the power and feel good about your work!

Jul 24, 2009 | Cooper Wiring Devices 6009W-K ROTARY...

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