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What does the blue color on the Mazda3's water temperature gauge mean?

1 Answers

DelHailey

07/30/25 9:39am

Mazda3's water temperature gauge showing blue indicates that the water temperature is too low. Below are the specific reasons for the low water temperature gauge reading: 1. Thermostat malfunction. The thermostat is stuck in the large circulation position, causing the engine to remain in large circulation after a cold start, resulting in low water temperature and preventing the engine from warming up. 2. Water temperature sensor failure. A faulty water temperature sensor may detect incorrect water temperature readings, which may not reflect the actual engine water temperature. 3. Abnormal radiator fan operation. If the fan runs continuously without engine control, it prevents the engine water temperature from rising. 4. Significant temperature difference between the engine and external environment. In extremely cold weather, the water temperature may rise slowly. It is recommended to warm up the engine for 2 minutes before driving to allow the temperature to rise.

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