How to Turn a Coldheat Into a Useful Tool


Introduction: How to Turn a Coldheat Into a Useful Tool

OH NO!!! You bought a Coldheat!!! Whatever shall you do with it? I know, you could turn it into something useful, like a flashlight! Here is a step by step way to turn your hunk of junk into a bright, working flashlight, which is perfect for your nightstand, and those mid-night trips to the lou.

Sorry for the grainy images, folks. My digital camera wasn't available, and all I had to take pictures was my video camera.

And, if you like my instructable, don't forget to rate it, and check out my other stuff.

Step 1: What You Need

This project requires these materials:
- One Coldheat
- One Small Screwdriver (The small flathead on the Leatherman works well, but you would be better off with a more precise tool)
- One Soldering Iron
- One Mini Light Bulb with Socket (I used a 2.5 volt)
- Some Solder
- Wire Stripper (optional)

Step 2: Open Your Coldheat

In order to get inside of the coldheat, you probably want to open it up. Remove the battery casing, then remove the screw that is inside the battery holster, and remove the top (blue thing on top). Then remove the five screws that hold the two parts of case together. You will want to save the screws for when you put it back together.

Step 3: Get Rid of the White Socket

You will need to start out by removing the black cylinder, setting it aside for later.

Remove the screws from the copper colored prongs, and pull off the white tip socket from the prongs, you need to keep only one prong, the one with two soldered wires attached to it. The other can be thrown away. You can throw the white socket away, you won't be needing it.

Step 4: Prepare Light Bulb

Hot glue the light socket into the black cylinder, as shown in the picture.

To all the techies: Yes, I know that the power in the circuit is probably too much for the light bulb and the socket. But I am not worried about it. So far, the light bulb hasn't burnt out yet, but if you know what kind of components I should add, please feel free to Personal Message me, and I will edit this Instructable accordingly.

Step 5: Install Light Bulb

Next you need to put in the light bulb. But before you do that, you need to trim down the remaining copper prong, so that the black cylinder can fit into place. Make sure that you leave the screwhole on the prong, so that you can screw it back into place.

Place the black cylinder back into place, and solder the wires for the light bulb as shown in the picture.

Step 6: Put It Back Together

Now you need to put your coldheat back together.

Replace the screws that held the prongs, that way they won't touch. Then, put the case back together, add batteries, and turn it on. Put the white semi-transparent tip cover on, so that the light doesn't hurt your eyes.



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    62 Discussions

    I broke a tip, I super glued it and been working great.

    You need to clean the tip occasionally. Use a small piece of 220 grit automotive sand paper between the tips. I have been using the same tip quite frequently
    for 2 years. No problems.

    I love my cold heat. Totally repaired my tv remote today with it. Great tool for cheap stuff.

    Wow! A LOT of negative energy in here. Coldheat is NOT hard to use, not is it evil, and I KNOW evil, trust me. It sounds like the major problem is user malfunction... and/or not knowing how to read instructions. I have used Coldheat very successfully for over a year and a half now, and only had to change batteries once. I think its all about understanding the way electricity and conductive heat works. I urge everyone to NOT give up on the device, just try a different meathod of using it.

    1 reply

    No... It does suck. The tip melts into little pieces after using it for ten minutes. If you actually manage to get the solder between the two broken prongs, it takes a while to melt. The package even says "This soldering tip is fragile. Please do not press hard." You must be one of a lucky few whose ColdHeat actually works.

    how IRONic that you need another soldering iron to turn another into something else... well, not really ironic, but silly?

    Good God those things terrible. I bought one at Radioshack a while back. It did not work at all. plus i paid like twenty dollars for it at radioshack. then the tip broke. i have a little butane powered one now for when i need it to be portable.

    9 replies

    they fail to advertise how they work, I found out the hard way, with a lithium-ion battery explosion. there is high current between both sides of the tip, and both sides must touch the metal, in order to heat, but in order to do that, you have to use excessive force to make contact, breaking the tip. I returned mine and went for a good old electric pencil iron.

    yeah. pass a huge current between two tips jumpered across by solder. an interesting question: seeing as the coldheat does not heat up, does that make all connections cold joints?

    no, the joint still has to heat up, for the solder to stick. and yes, it's somewhat like an arc welder, but it lacks the voltage to make an arc.

    so its a failure as a soldering iron and as a welding torch. seems to make a good flashlight though.

    Just curious... is it still working? I've had some friends who said theres worked well and others who... well, read the comments here!

    OH NO!!! YOU GOT A COLDHEAT!!!!!!!!!!! A truly terrified response, completely fitting to the truly terrifying situation that your money has been spent (destroyed) on what may be the worst thing...ever!

    i had a cold heat about a year ago. it broke 3 weeks after i got it. cold heat for soldering = BAD