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What is the reason for the thermostat valve not opening and the fan not stopping?

1 Answers

RyderLynn

08/26/25 4:01am

The thermostat valve not opening may be due to the vehicle's thermostat being installed in the wrong direction, or it could be an issue with the quality of the thermostat itself, requiring replacement of the thermostat. Below is an introduction to related knowledge about the thermostat valve: 1. Function: The car thermostat's role is to remain closed when the vehicle's temperature has not yet reached the normal operating temperature. At this time, the engine's coolant returns to the engine via the water pump, creating a small internal circulation within the engine to facilitate rapid warming up. 2. Thermostat location: The thermostat is generally located at the junction of the engine and the radiator hose. Some are on the upper side, while others are on the lower hose. If it appears slightly oval in shape, it is inside. Some thermostats are located in the hose leading from the cylinder head to the radiator, with a small hose connected to the water pump nearby.

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