Thermostats, like other parts, just fail. That's why there are about a zillion of them for sale in the auto parts stores. Just pick up a new one, if you think yours has failed. FriPilot
It will probably overheat. answer= thermostat will not open and will prevent the flow of coolant . which will in turn do damage to your engine
If the thermostat does not open, it will prevent the coolant from circulating through the engine properly. This can result in the engine overheating and potentially causing damage. It is important to replace a faulty thermostat to prevent engine issues.
If it's stuck open, no heat. If it's stuck closed, over heat.
When the thermostat in your car fails it usually fails to open which in turn does not allow radiator water to pass through the engine and cool it, so the engine over heats.
Sounds like your thermostat is stuck open. Replace that and see what happens.
If the thermostat in a vehicle sticks open the engine will not reach proper operating temperature. The open thermostat will prevent the car's heater from giving much or any heat during cold winter driving and will also cause the engine to use more fuel than normal.
If the thermostat is open, the ohm reading will be O/L.
The thermostat is done it has to be replaced.......
The thermostat is in the radiator. Open the radiator lid and pull the thermostat out.
The thermostat that open at 195 F.
Usually the car would run cool, unless the thermostat is stuck partially open.
The thermostat is probably stuck open, even when the engine is cold.