What Causes the Car's High Temperature Alarm?

[OmarRose]

The reasons for a car's high temperature alarm are: 1. Lack of coolant or coolant leakage; 2. Dirty exterior or interior of the radiator; 3. Damaged thermostat; 4. Damaged water pump; 5. Damaged cylinder head gasket; 6. Damaged cooling fan and its control system; 7. Poor connection between the engine and the car frame, causing inaccurate feedback from the temperature sensor and resulting in a false reading on the temperature gauge. The solutions for a car's high temperature alarm are: 1. Stop the car but do not turn off the engine, then open the hood to inspect the cause and take appropriate action based on the specific situation; 2. If the water pump belt is broken, do not turn off the engine immediately. You can use water to cool the radiator and wait until the temperature drops to a safe level before turning off the engine and replacing the belt.

[VonParker]

I've personally experienced the high-temperature alarm. That summer, I was driving out for fun when suddenly the dashboard lit up red and started beeping, which really freaked me out. After stopping and opening the hood, I found the coolant was almost gone—turns out the small radiator was leaking and I hadn't noticed. Common causes, besides low coolant, include a stuck or non-functioning cooling fan, intermittent water pump operation, or clogged radiator fins due to dirt buildup. Engine overheating not only leaves you stranded on the road but can also burn out the cylinder head gasket, costing thousands in repairs. So, as soon as I noticed it, I pulled over, turned off the engine, and called for a tow truck. Since then, I've made it a habit to check the coolant every month to avoid further trouble.

[GeorgeDella]

I usually pay great attention to car maintenance. High-temperature alarms mostly stem from cooling system issues. Problems like aged and deteriorated coolant, poor contact in the fan circuit, worn water pump blades, or a thermostat stuck in the closed position can lead to poor water flow. Last time, my car had a blown fan fuse, which was resolved after replacement. It's advisable to clean radiator debris during regular maintenance to prevent dust buildup from affecting heat dissipation. If the alarm sounds while driving, immediately slow down and stop at a safe location. Don't push the car to keep going, as an overheated engine can warp, leading to higher repair costs. It's also wise to keep some coolant on hand for emergencies.

[Sanchez]

High temperature alarm indicates that the engine temperature exceeds the standard, most likely because the fan is not turning, coolant is leaking, or the water pipe is broken. I have encountered this situation before. After stopping to check, I found that the fan control module was faulty. If not dealt with in time, it may damage engine components, such as pistons or cylinder blocks. It is recommended to park in a shaded area as soon as possible and wait for the engine to cool down before restarting. Regular maintenance can reduce such risks.