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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?

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steveastroukBest Answer (author)2014-06-30

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

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Jakey2 (author)steveastrouk2015-07-22

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.

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steveastrouk (author)Jakey22015-07-22

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

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Jakey2 (author)steveastrouk2015-07-22

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.

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steveastrouk (author)Jakey22015-07-23

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 ?

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Jakey2 (author)steveastrouk2015-07-23

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

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