Quote Originally Posted by damha View Post
I wish you had included some current draw numbers. Looking at the discoloration around the 3.25 center tells you just how much hotter that thing gets over the 3.1. To me hotter = higher failure rate.
I wouldn't put too much stock into the PCB discoloration on DDC's. Both of those pumps look exactly the same when I took them apart prior to testing for a quick inspection. I would have done draw number if the one DMM I have didn't blow it's 10A fuse about 2½ years ago. I've been unable to find a replacement locally and I'm not about to buy another $100 DMM when everything else works on mine, I simply can't afford it. The analog I have only goes to 250m which is useless for these pumps.