If the thermostat works properly, the hose will stay fairly cool for a few minutes, then will quickly warm up. If the hose warms gradually from the start, the thermostat has stuck open. If the hose does not warm much, but the engine soon gets hot, the thermostat has stuck closed. Mak...
Engine overheating: If the thermostat is stuck in the closed position, it prevents coolant from circulating through the radiator to be cooled, causing the engine temperature to rise rapidly. This overheating can cause serious damage including warped cylinder heads, blown head gaskets, and in severe...
The thermostat is stuck in either the open or closed position. The thermostat is clogged due to dirt and debris. Fixing The Thermostat Fortunately, there's some good news: the cost of fixing a thermostat is generally much lower than you might expect. How much? Well, it depends on several...
Test the Thermostat: A faulty thermostat can get stuck closed, preventing coolant from circulating. Replace it if it’s not functioning correctly. Inspect the Fans: Cooling fans draw air through the radiator when the car isn’t moving. If the fans aren’t turning on, check the fan motor, ...
Once the engine temperature reaches a certain threshold temperature, the thermostat opens the cooling system so colder coolant from the radiator can flow to the engine. The thermostat will usually open once the engine is at around 200°F. If thethermostat is stuck closed, your engine may overhea...
This is the opposite of the first. When it is stuck on closed position, it would not release any coolant which would then result in overheating (and worse, self-destruction). Cause of Irregular Engine Temperature Other than your car thermostat, irregular engine temperature may also be a result...
The engine may have mechanical problems.The Fix:Check compression to determine the engine's condition. The engine's thermostat may be stuck closed.The Fix:Replace the thermostat. There may be a leak in the cooling system.The Fix:Repair the leak and refill coolant. ...
A malfunctioning thermostat is often stuck in the open or closed position. If it’s stuck in the open position, it allows too much coolant to flow, preventing the car from reaching optimal operating temperature. A thermostat stuck in the closed position won’t allow coolant to circulate, which...
As we mentioned above, the working principle of a car thermostat is really simple, yet it is an impressive component of a car. If you have a chance to test it, you will soon realize it seems impossible. You can put one in a pot of boiling water on the stove. As it heats up, its...
where the radiator cools the heated fluid and prepares it for reentry into the engine. In the closed position, the thermostat prevents engine coolant from entering the radiator, which helps speed warm-up of a cold engine. If the thermostat gets stuck in the closed position, engine coolant sta...