If the stat is stuck open,your car will slowly overheat and not reach normal operating temperature, if it is stuck closed it will overheat very quickly.
If the engine is overheating, the thermostat is stuck closed. If the heater is not putting out enough hot air the thermostat is stuck open. Change the thermostat as a normal part of maintenance when changing coolant.
If the thermostat is stuck open, the engine will never warm up to proper temperature.
A thermostat can be stuck open or closed. If the engine runs to cool it is stuck open. If the engine is running hot it is stuck closed. If you don't have these problems you should'nt have to change it.
Usually the car would run cool, unless the thermostat is stuck partially open.
If your engine takes a much longer time for the thermostat heat guage to reach its required level of operatiing temperature then the thermostat may be stuck in the open position which means that it will need to be replaced.
Overheating if stuck closed, no engine heat if stuck open.
Stuck closed thermostat. Replace the thermostat.
Thermostat is stuck open Thermostat is stuck open
A stuck closed thermostat can lead to severe overheating which can lead to severe engine damage which then leads to big money for repairs.
It depends on the symptoms. If you get poor heat from the heater and the temp gauge doesn't go up to normal, the thermostat may be stuck open. If the temp gauge reads hot quickly and the engine overheats, it may be a stuck closed thermostat. There could be many other reasons the engine is overheating and many are costly. Replacing the thermostat is a good place to start because the cost is minimal.
Replace it.
thermostat can be stuck open