Some small cooling systems can be quickly overcome by cold air rushing thru an open grill; This is why you will sometimes see 'winterfronts' on some vehicles. Even cardboard in front of the grill will help.Make sure your radiator is full; even if it is a little low it will make a huge difference in it's ability to maintain heat as cold air rushes thru it. I hope this helps you. Mark
Since you had to unplug the wire connector, there is most likely damage to the connector. Check it carefully.
The temperature blend door may be at fault.
could be your thermostat is stuck or perhaps and needs to be replaced.
If the temperature goes up and down and the coolant level is ok your thermostat is probably sticking. Replace the thermostat and you should solve the problem.
this could be as a result of failed thermostat, since they now fail-safe ie they're opened to allow water to circulate freely.
The Thermostat and Temp and Press Valve is faulty and needs to be replaced. or the PRV (pressure reducing valve) is dirty and must be replaced
change the thermostat
The thermostat is a device which blocks the flow of coolant through the radiator until the coolant inside the engine reaches a certain temperature, at which point the thermostat gradually opens to allow enough coolant though to maintain the engine at its optimum operating temperature. The thermostat then controls the flow of coolant to keep the engine at that temperature irrespective of engine load and operating conditions. Without a thermostat and engine warms up more slowly and will never reach its optimum temperature. This causes increased fuel consumption and increased wear on the moving parts.
Sounds like blown head gasket.
the reason why the coolant is spilling up over the reservoir is because the thermostat needs to be replaced because when the engine needs water the thermostat heats up from the engine and causes the springs to expant which opens a seal to allow the water throughout the engine i just realpaced the thermostat in my volkswagen
Could be a bad thermostat - not closing allow water temperature to reach 195
My 1995 Ford Explorer was running cooler on the temperature gauge and it turned out to be my thermostat