Unfortunately with loose connection problems, it will often test OK on your multimeter in continuity mode. It is only when you put a load on the connection (and sometimes it may also require heat and/or vibration) to measure the problem. You are then dealing with line voltages during your measurement, so not recommended for a home gamer. I believe you might be able to locate these kinds of issues using something like FLIR though. It is quite common in electrical fault finding; failing connections will often heat up considerably. In this case here you can see that part of the switch has slightly darkened, which would indicate excess heat. I think you'd be able to discern the difference between this heat and the heat of the boiler itself, but I don't have any first hand experience. As devices like the FLIR phone attachments become more prevalent, you might find they become a really handy tool for diagnosing machines like this. On Wednesday, September 16, 2020 at 5:33:14 AM UTC+10 [email protected] wrote:
> Good job, thanks for sharing. All our machines will start to fail with > these weird sort of age related problems. > > I looked at the picture and still couldn't see any blackening. Was it > where the spade connected to the switch? > > Other than that pesky 50% repro - couldn't you debug this with a > multimeter? > > On Friday, September 11, 2020 at 12:30:32 PM UTC-7 MDR wrote: > >> Hi All, >> I recently had a problem where my Brewtus II (+PID) would reach temp, >> allow me to pull a shot, then the brew boiler would shut down. This message >> is to record the solution for future users >> >> Of course, the issue was intermittent, happening about 50% of the time, >> so difficult to debug. The high limit temp sensor on the boiler seemed to >> be the issue, but I couldn't figure out why it only occurred >> intermittently. Finally discovered that the spot weld where one of the >> connector spades attaches was loose, causing an intermittent connection. In >> wiggling it around to troubleshoot, the resistance increased so much that >> it caused the joint to blacken - I finally spotted it. >> >> Link to image - you can barely see the darkened spotweld on the near >> connector. >> >> https://photos.app.goo.gl/xnbodXratDnTN2TM6 >> >> So, be aware of intermittent connections when you troubleshoot. >> > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/brewtus/9da3c40a-886d-4f5f-9c3d-eedd59d1694en%40googlegroups.com.
