The thermostat in your car is responsible for controlling the amount of coolant released into your engine. When your car first starts up, the thermostat is closed and does not allow coolant into the engine until it is warmed up. The thermostat should open and allow coolant in once the engine is adequately heated. Sometimes the thermostat fails and remains closed. This article will discuss how to tell if your car’s thermostat is stuck closed.
Look to see if your temperature gauge is nearing the danger point. This tends to happen quickly, so turn off your car as soon as you notice it.
Open the hood of your car as long as it is not too hot and locate the radiator hoses. If the hood is too hot to touch, wait at least 10 minutes before opening it.
Touch the top radiator hose carefully.The hose can be very hot, so only touch it for a few seconds with your fingertips. Repeat for the bottom radiator hose.
- Both radiator hoses should be very warm to the touch. If one hose is very hot and the other one feels cool or even cold to the touch, the thermostat is likely stuck in the closed position.
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