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Phooey. I edited my post and it got "flagged for moderation," which means it's never coming back. This forum software is awful.

The short version of my post is that I don't think an IR thermometer will tell you much because its aperture is too wide to give you just the temperature of the connector. It's the same reason you can't use it to measure the temperature of your hot end.

The point of this thread is the potential fire hazard in your printer, and for something to catch fire, you need to get to the ignition point, which for filament or wire insulation, is way above the 200° C use to melt your filament. Since 200° would burn you instantly, if you can grip the power connectors that we're talking about and barely feel any warmth (which is what I found after I made my post above), you don't have a problem and don't need a thermometer to confirm that.

However, DO get the IR thermometer. I use mine every single day, mostly in the kitchen for measuring pan temperature, over temperature, refrigerator temps, and more.