Hello, my car's air conditioner, heater and water thermometer will be turned off as soon as they are turned on. What happened?

If it is normal, it will happen, so it mainly depends on what season, if it is winter,

If the warm air is turned on, it is normal for the water thermometer to drop directly. If it is in summer, such as turning on the air conditioner, and the water temperature is still dropping, then there are some problems in the circulation.

So you can carefully check whether the circulating pump and other circulating pipes are blocked.