Thermostat
What is a Car Thermostat?
https://axleaddict.com/auto-repair/car-thermostat-troubleshooting
Car thermostat problems — Check your thermostat in a few minutes without removing it from your car.
How Thermostats Work
How to Replace a Car Thermostat
https://www.howacarworks.com/cooling-systems/how-to-replace-a-car-thermostat
This article covers checking the thermostat on a car, and changing a thermostat.
Symptoms of a Bad or Failing Thermostat
https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-thermostat
Common signs include the temperature gauge reading being very high or changing erratically, engine overheating, and coolant leaks.
Understanding and Testing Thermostats
Thermostat Replacement
Engine Thermostats Functions
http://www.agcoauto.com/content/news/p2_articleid/191
AGCO provides overall lowest costs of vehicle ownership. We do this by providing extremely high quality automotive service, following the theories and practices of Dr. W. Edwards Deming., engine thermostat, fuel mileage and over heating