I have a electric setup I built that uses pt100 probes to take temp measurements for the PID controllers. The setup is still new and I am ironing bugs out, but this one has me stumped. The temp readings have started fluctuating wildly from the correct temp down to the lower limit and everywhere in between. I can effect this by moving the probe wire and can get the reading stable at the correct temp with a little wire wiggling, so I'm fairly confident the issue is not with the PID. What could be causing this? The wire is kept out of the way and is not being bumped or moved by accident. The probe itself passes through the side of the kettle and has a disconnect for the wire. The wire runs to a male xlr connector that plugs into my control panel. I soldered the xlr connector on, but the rest of the probe/wire assembly came built from the manufacturer.