What to Do If the Thermostat Is Broken?
2 Answers
If the thermostat is broken, it simply needs to be replaced. The thermostat is part of the cooling system and is a device that controls the coolant flow between the large and small circulation loops. The thermostat automatically adjusts the amount of water entering the radiator based on the coolant temperature, altering the circulation range to regulate the cooling system's heat dissipation capacity, ensuring the engine operates within the appropriate temperature range. The thermostat must maintain good technical condition; otherwise, it can severely affect the engine's normal operation. For example, if the main valve of the thermostat opens too late, it can cause the engine to overheat. Conversely, if the main valve opens too early, it prolongs the engine's warm-up time, resulting in the engine running too cold.
If the thermostat in my car accidentally breaks, it's not something to take lightly, as it directly controls the engine's temperature. Once broken, the coolant won't circulate, and the engine could overheat at any moment, damaging components. Having driven for over five years, I've seen this situation many times. Once the temperature gauge spikes or the engine warning light comes on, you must immediately pull over and turn off the engine. Otherwise, forcing it to run will lead to costly major repairs. After stopping, don't rush to restart—wait for the car to cool down, then call a tow truck to take it to a trusted repair shop for a new thermostat. Actually, this issue is quite common, often caused by aging, low-quality parts, or lack of timely maintenance. That's why I check the cooling system and top up the coolant every quarter—prevention is always better than breaking down on the road, ensuring safety and peace of mind. The new stainless steel one I replaced it with is much more durable, making long trips a lot less worrisome.
