87Views3Replies

Author Options:

need replacement for Koolatron heat exchanger Answered

My refrigerator died. the heat exchanger won't test. It's 3.75 x 4 inches without the radiator fins. 40 watts DC. Apparently Koolatron doesn't carry them, planned obsolescence is unethical (unless you're a shareholder). Where do replacements come from?

Discussions

So this is Peltier fridge ? Look on Ebay for a Peltier cell that's the same size as the one you have. You're going to have to carefully disassemble the existing unit

same problem with the ones on ebay and Amazon, they work for a few days and then conk out. I used thermo-paste too. too bad, the original worked fine for a year.

Could just be your mounting technique - I have stuff more than 10 years old, with the same cells.

Make the heatsinks perfectly flat by lapping them on wet and dry paper on a sheet of glass.

Apply almost transparent amounts of thermo paste

Thanks! I'll try that. The ones that came out, including the original, had a layer of thick white stuff like chalk where the paste should be.

It should never, ever be a thick layer. Take the wet and dry down to at least 600 grit, preferably 1000.

And a year has passed. Isn't it time you marked this as a best answer ?

Ok I did. I haven't tried it though, need to dig it out first.