What are the reasons for slow temperature rise when the thermostat is not broken?

[LeMichael]

The reasons for slow temperature rise when the thermostat is not broken are: there may be issues with the thermostat or the water temperature sensor. The effects of removing the thermostat include: 1. Slow heating in winter; 2. Slow rise in water temperature, leading to increased fuel consumption; 3. Prolonged cold engine operation, resulting in faster machine wear; 4. Severe wear and tear on the engine. The thermostat operates based on the engine's water temperature. If the thermostat malfunctions and the valve fails to close, the coolant will continuously circulate in the large loop, potentially causing the engine's water temperature to remain too low. The solutions for a broken thermostat are: 1. After starting the engine, check if there is water flow in the cooling radiator; 2. Inspect the radiator inlet pipe for water flow; 3. Observe the water temperature gauge to see if it shows any abnormal behavior.