First, I would change the thermostat, easy on these models. Then check it from there. It could also be the water pump, not circulating enough. Could also be a blockage in the hoses or the rad. But, go with the thermostat first.
It is a plug on the block to prevent the block from cracking in cold weather, though this is seen to be a wives tale.
thermostat stuck
Yes you definitely need a thermostat to keep engine from overheating + or overcool,g especially in cold weather.
Insufficient protection against freezing in cold weather or severe overheating.
Group 58, 750 cold crank amps top mount posts.
The temperature will keep the 1986 ford tempo automatice transmission to stay in first gear because this car was design for the cold. Changing the gear to early and a cold temperature could ruin the car.
Depends on your location.
it is used with a small heater to heat the water in the engine for easier starts in very cold weather
at the bottom of your if it is cold or warm then it controls body temperature
It may have the wrong fluid in it.
Your model should have a motor plug. If you plug it in to the wall outlet in cold weather overnight, you should have no problem to get it to start.
Possibly low coolant level, or temperature control door either set to cold or not working correctly.