Picked up 7 broken units on eBay (all in one sale). 2 Precision, 4 Nano and a Pro (I believe). Many of them have the low water issue. I’ve had them going in a bath of coffee descaler (Brew Rite) for several hours. So far, one of the Nanos appears to be working now. If I can fix one more, it will pay for the entire investment.
Questions: What is the strongest thing I can use for cleaning (to hopefully fix the low water sensing issue)? This cleaner has calcium carbonate, which I believe is alkaline. Not sure if I should dump that and if it doesn’t work, flip sides and go acidic with citric acid? Interested to hear your points of view.
The one with no heat is a Precision, so it’s easy to open up. Saw somewhere on Google that I can try replacing the triacs in the circuitry (yes, I’m handy with a soldering iron and have hot air station too). Any info on things to try on that one or should I go ahead and look at circuitry?
Is there any way to open these Nanos? Since these have been deemed dead and are not subject to warranty (that I know of), I’m not afraid to use a drill or saw (carefully) and glue/clamp/whatever after the fact. I enjoy the challenge of fixing these. I now have 3 working units and would’t mind giving a few away if I get them working.
Also, one of the Nanos has weird temp readings - the temp goes all over the place and seems to rise to 200+ degrees even though the water is around 150. So, what could’ve gone wrong there?
Interested in any thoughts on any of the above, thanks!