Is there a relationship between poor car heating and the thermostat?

[McBella]

Yes, there is a relationship. The reasons are as follows: 1. A damaged thermostat can cause the engine's water temperature to rise slowly. 2. The thermostat is installed in the coolant passage and its function is to control the small and large circulation of the coolant. 3. The coolant circulation passage is divided into two routes: one circulates only within the engine, called the small circulation, and the other exits the engine, passes through the radiator for cooling, and then re-enters the engine, called the large circulation. 4. The thermostat is installed at the junction of the small and large circulation routes. When the thermostat is closed, the coolant cannot flow out and can only perform the small circulation. 5. The thermostat uses expansion or contraction to open or close the flow of coolant, automatically adjusting the amount of water entering the radiator based on the temperature of the coolant, thereby changing the circulation range of the coolant and regulating the cooling system's heat dissipation capacity.