Sunday, August 21, 2016, 9:53:28 AM, you wrote:
| OK, new battery - no reading at all, same display as when probes are not touching. Normal reading when probes touching |
What kind of meter. A GFI can be set off by resistances high enough some meters can't measure them. My Fluke has no problem seeing them, the Harbor Freight meter, not so much. Also, try plugging it into a non-GFI outlet to heat it up a bit and see if that measurement changes, well only if you understand the potential consequences and realize that you need to turn the machine on before plugging it in and unplug it before touching it again. Also, if you have a 3 pin to 2 pin power adapter so you can isolate ground, use that to let it heat up and then measure the voltage from the case to ground. Again, be very careful, touching the wrong thing could conceptually kill you. Should be 0 or close to 0. If it's 117 or close to that, you likely found the problem. Then unplug the problem boiler leads and see if it changes.
I'm perfectly comfortable doing stuff like that, but there are some risks associated with those sorts of troubleshooting methods. Make sure you understand before you start and make sure no dogs, cats or children can get anywhere near where you're working.
-- Ira --
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