Bed Not heating any longer
All,I have a Monoprice Maker Select 3D Printer V2 unit. Long story short it was a basket case when I got it from a relative who gave up on it.The relative did a lot of replacement upgrades but finally ended up going to a more advance printer.I gladly took it off her hands and set the unit up and "leveled" the bed etc. I got it to the point I could pick 3D Print and print it. On occasion I would get a bad print but for the most part I printed about a dozen or so good size prints (say 30-40 hours of good printing) over the past 6 months. I was on a 9 hour print that was 2 components to hang my Netgear ORBI Satellites on the wall. The first one came out very decent and I was moving on to the second. It was running and about 2 hours in I got a thermal runaway errror which ended the print. I shut everything down and left it for the night. Tried again in the morning and the bed appears not to be heating and it will end up with the thermal runaway warning after a set time.I guess my questions are I am assuming it is a thermistor. How do I know its a thermistor versus a heat bed? If I used my DVM (Digital Volt Meter) and did a Ohm reading between the wires would that tell me if the thermistor is good or bad...would it be commonly be open on failure or would it fail in some other method?Should the heat bed be getting any voltage on initial start to preheat? (I assume its DC what voltage?) If it turns out to be a thermistor where is a good place to buy? Will any thermistor basically work? I see there are "generic" or this fits most 3d printers 100K thermistor. Better ones?Lastly, As the changing of this part could be more efficient by cutting/adding a connector that is external of PSU unit but before the bed a considerable amount. Basically avoiding the bed movement stress on the new proposed connector but at the same time reducing the changeout. (Not having to get into the PSU unit). Has anyone tried or considered this change?Thanks for the help,Chris
