What Causes High Water Temperature When Running the AC in a Small Car?

1 Answers
LeKarter
07/29/25 11:39pm
The reasons for high water temperature when running the AC in a small car are as follows: 1. Cooling fan not working: The cooling fan may be controlled by a thermostat switch or a water temperature sensor. 2. Insufficient coolant: A leak in the cooling system can lead to insufficient antifreeze, which in turn causes the antifreeze temperature to rise. If the antifreeze level is found to be low, check for leaks. If there are no leaks, promptly add the same type of antifreeze. Do not add tap water or other types of antifreeze to avoid dilution or sedimentation, which could lead to failure or malfunction. 3. Damaged thermostat: If you plan to remove the thermostat, ensure the small circulation loop is blocked to guarantee all coolant is cooled by the radiator. When installing a new thermostat, make sure it has a water hole.
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