How to adjust the throttle water temperature to rise rapidly?

The water temperature you said is normal in this range. Because the normal working temperature of the engine is between 90-95℃, too high or too low will do harm to the normal working of the engine. Now that the weather is cold, it is normal for the water thermometer to fluctuate within this range. As long as it doesn't boil, it's okay. I hope my answer is helpful to you.