Generally they don't "bust". They stick open or closed usually from wear. If the thermostat sticks open the engine is slow to warm up and gives you poor heat from the heater. If the thermostat sticks closed the engine overheats quickly and can cause serious damage. The weather doesn't have any effect on the thermostat however, if the there isn't sufficient antifreeze protection and the coolant freezes the engine will overheat quickly and can cause serious damage much like a stuck closed thermostat. Generally a 50/50 mix of clean water and antifreeze will protect the system to -34 degrees F. Have the coolant tested if your not sure.
Is the thermostat in backwards??? it depend on where u live hot or cold weather... german cars are made for cooler weather... this will efect the way ur car will run
If stuck open the car will run cold. If stuck closed the car will run hot.
You need to change your thermostat in the car.
There are a few reasons why a car might stall when cold. The car might just be stiff from the cold weather.
if you are in cold weather you do.
open or missing thermostat
When the car is cold the thermostat is closed. When the thermostat is closed the coolant does not circulate or get in to the engine block.
Insufficient amount of coolant or thermostat not opening
The engine produces heat no matter the weather. The cooling system must have a problem such as a bad thermostat, bad fan clutch, plugged radiator, missing radiator shroud or low on coolant because of a leak somewhere.
Cold weather can affect a car starter if you overwork by holding it in the on position too long and repeatedly. The starter motor can wear out.
It stops your car from freezing and not starting up in cold weather