Some electronic parts are not rated to work below 0° C - for ‘commercial’ equipment the range is usually 0° to 50°C, and you often have to pay extra to get ‘ind

Some electronic parts are not rated to work below 0° C - for ‘commercial’ equipment the range is usually 0° to 50°C, and you often have to pay extra to get ‘industrial’ or extended range versions of parts that have ranges like -45° to 85°C (some fairly common parts you can even get to 105°C). It it’s failing at 10°, I’d suspect there is a crack in a PCB somewhere or a badly soldered joint that isn’t actually making proper contact until there’s some thermal expansion. We don’t do anything special with the PCBs or soldering specifically, and all the stuff we make is tested down to -35° and up to 55°C with no issues…