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How to fix broken Christmas lights: Tips for solving common problems with string lights, burned-out bulbs

christmas lights

We're all looking to bring a little extra brightness into the end a difficult year. But no matter what holiday you celebrate, there's a chance you may find yourself tangling with Christmas string lights this season. Burned-out bulbs, strands that light up only halfway (or not at all), and let's not forget those knots.

You don't have to go too far down the internet rabbit hole on Christmas lights before encountering complicated electrical diagrams and DIY'ers offering tips on how to rewire your plugs. Fascinating? Yes. How I want to spend my December? No.

For those of us not quite as skilled in the electrical trade, here are some common problems with string lights and how to solve them.

Ho-ho-how much? Americans put up more Christmas trees this year, lifting prices.

One bulb is out, but the rest of the string works You’re in luck. This is the simplest fix, requiring you to simply swap out the bulb for a new one. Assuming your bulbs are removable — not hardwired, as some LED strings are — there should be spare bulbs in the original box. You might also consider buying a strand of matching lights solely as a source to pilfer extra bulbs.

Experts have an additional piece of advice here: If you have one or two burned-out bulbs on an otherwise functioning strand, don't ignore them. The remaining bulbs could be contending with excess voltage that shorten their lifespan.

If only half the strand is out... If half a strand is working and the other half is not, you probably have a loose or broken bulb. Start with the first unlit bulb and work your way down, wiggling them to check for looseness. If it flickers, that's your cue to replace it. If not, you have the more tedious job of going down the row of unlit bulbs, one at a time, and swapping them for a known, good bulb until you find the culprit. You'll know it when the strand lights back up.

If the whole strand is out... If you find yourself with a dead string of lights, a number of things could be wrong. First, try plugging it into another electrical outlet. If that's not the problem, it could be a loose or broken bulb. See the previous section for instructions.

The problem may also be a bad fuse. Most string lights have two tiny fuses inside the plug. Typically, a box of lights is also packaged with a replacement fuse or two.

To replace a fuse, take a small set of pliers or flathead screwdriver and slide open the cover. Then gently pop out the fuse and replace it with new ones. Slide the cover closed and plug it in. If you have only one extra fuse, try replacing them one at a time. If you need more than one, replacements are typically available at most hardware and craft stores during the holidays.

Specialty repair tools that might speed things up Unless you're replacing a single burned-out bulb you can easily identify, hunting down the problem bulb that killed your whole strand is dull work.

A light tester, like the one from Light Keeper Pro, is relatively simple to operate and will save you a lot of time for only $20. Spare fuses and bulbs are also recommended — just make sure they correctly match the strand.

Dealing with non-removable bulbs Some LED string lights have non-removable bulbs. Contrary to what you might think, this can be more of a boon than an inconvenience. In fact, it's a standard for commercial lighting due to their higher reliability and longer lifespan.

Even so, non-removable bulbs can eventually burn out or become damaged and take out the whole strand. For those cases, LED Keeper seems to be the tool of choice.

Impossible tangles A tangled string of Christmas lights really is its own special brand of torture. Unless you've been practicing your escape routines, you could be at those knots for a long time. To make matters worse, vigorous tugging on the string will only further damage the bulbs.

Sorry to tell you now, but prevention really is the best medicine. Save yourself a headache next year by wrapping them around something like a piece of cardboard. Just cut a small slit to stick the electrical plug through, wrap your lights around, and then poke the other end through the same slit. Boom, you've just repurposed some cardboard and given yourself an early gift for the next holiday season.

This article was originally published by David Kender, usatoday.com. 

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