This is a quick and easy to test to see if your car's Thermostat is operating correctly, without having to remove it!! The video also covers common symptoms of a broken Thermostat, in both open and closed positions.
USEFUL LINKS:
1) How to replace your Thermostat (Grand Caravan/Town & Country):
https://youtu.be/UKtnyxDzjOY
VIDEO BY YOU WRENCH