Too Cold To Start Printer

Just thought I’d mention this for those who print in cold conditions because I had a minor freak out until I googled the error message. I forgot to turn on the space heater in my garage today and the ambient temperature outside got down to about 30F after sundown. In my garage, the thermometer read about 40F, and I’ve been printing at these temps fine, but for whatever reason, when I tried to connect to the printer, I got this error:

Extruder switched off. MINTEMP triggered !
Error:Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)

Anyway, I turned on my space heater and hit the hot end with a hair dryer for about a minute. After that, all was well. Apparently, if the thermistor goes below a certain level, it triggers this warning because it can’t read the temperature accurately that low. When I finally was able to connect, the build plate read 5C, which is well above freezing, but I guess it was just a little too low (assuming the print head was a similar temp).

Looking at the Marlin code MINTEMP is 5 C.