Replacing a lamp switch knob is a relatively simple task that most homeowners can tackle themselves. The knob is the part you turn on and off to control the lamp. Over time, lamp knobs can become loose or damaged. Replacing a knob is an easy way to update the look of a lamp or fix a knob that no longer works properly.
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When to Replace a Lamp Knob
There are a few signs that indicate it’s time to replace a lamp knob:
- The knob is loose and does not stay in the on or off position
- The knob is damaged, cracked, or broken
- The knob does not line up properly with the lamp
- You want to update the style or look of the lamp
If your lamp knob exhibits any of these issues, it’s likely time to replace it. Replacing the knob can often fix functionality problems with controlling the lamp. It’s also an easy DIY project to update the look of an outdated lamp.
How to Replace a Lamp Knob
Replacing a lamp knob is a very straightforward process. Here are the step-by-step instructions:
- Unplug the lamp. Make sure it is turned off and disconnected from any power source.
- Inspect the knob to determine how it is attached. Most knobs are attached in one of two ways:
- A set screw on the side of the knob. This screw needs to be loosened to remove the knob.
- The knob is threaded directly onto the lamp rod. The knob unscrews counterclockwise.
- Once you’ve determined the attachment method, go ahead and remove the old knob. Use a screwdriver if there is a set screw. If it’s threaded on, turn counterclockwise to unscrew.
- Examine the exposed lamp rod ends once the old knob is removed. Make sure there are no rough edges or burrs.
- Select your new replacement knob. Make sure the new knob is designed to fit the lamp. Check that the attachment method is the same.
- Install the new knob, screwing it into place clockwise or tightening the set screw.
- Reconnect the lamp to the power source and test it out.
The basic steps are to turn off and unplug the lamp, remove the old knob, then install and tighten the new knob. The whole process should only take about 10-15 minutes.
Choosing a Replacement Knob
There are a variety of replacement lamp knobs available at hardware stores and online. Here are some tips for selecting the right one:
- Match the size and shape. Choose a knob with the same diameter and profile.
- Match the material. Most knobs are metal or plastic. Select the same type.
- Match the attachment method. Look for a knob that uses the same set screw or threading method.
- Consider the style. Choose a decorative knob that matches your lamp style and home decor.
Make sure to note the important measurements of your existing knob so the replacement fits properly. Keeping the same size and attachment method ensures the new knob will install correctly.
Troubleshooting Lamp Knob Replacement
In most cases, swapping out a lamp knob is very straightforward. But here are some troubleshooting tips if you encounter any issues:
Knob is too loose
- Tighten the set screw (if present)
- Add rubber O-ring or tape to increase friction
- Replace knob with one that fits tighter to the lamp rod
Knob is stuck or frozen
- Apply penetrating oil around the edges and let it soak in
- Gently tap around the edges to break it free
- Heat around the outside with a hair dryer or hot towel
Stripped threads when removing old knob
- Wrap threads in teflon tape or use thread sealant to get a good grip
- Chase threads with a tap to clean up any burrs or damage
- Purchase a replacement rod if damage is too great
New knob is loose or doesn’t turn lamp on/off
- The rod diameter may be incorrect, choose a knob specifically for your lamp size
- Multiple knob extensions may be needed for proper contact with the switch
- The switch itself may need to be replaced if faulty
With most issues, there is a solution to get the knob fitting and working properly. Taking the time to troubleshoot will save you from having to replace the whole lamp.
Conclusion
Replacing a lamp knob is usually a quick and easy upgrade. With just a few steps, you can have a functioning lamp with a brand new knob. Make sure to match the size, shape and attachment method when choosing the new replacement. With a little bit of handiwork, you can give your lamp an updated look without having to buy an entire new fixture.