What Are the Reasons Why the Car Temperature Gauge Doesn't Rise?
2 Answers
There are several reasons why the car temperature gauge doesn't rise, including a faulty coolant temperature sensor or a malfunctioning temperature gauge. Below are detailed explanations: Faulty Coolant Temperature Sensor: A faulty coolant temperature sensor can interrupt the temperature signal sent to the dashboard, creating the illusion that the coolant temperature isn't rising. Even if the engine coolant temperature is high, the temperature gauge won't respond. Solution: Check whether the coolant temperature sensor has failed or if there is a fault in its wiring, and replace it if necessary. Malfunctioning Temperature Gauge: Issues with the temperature gauge mainly include an open circuit in the power supply line or damage to the gauge's heating coil. Solution: Inspect the main power supply line of the temperature gauge to ensure it is properly connected, and replace the temperature gauge if needed.
A while ago, I noticed the temperature gauge in my car wasn't rising, which really stressed me out as a new driver. Turns out, the most common issue is the thermostat getting stuck in the open position—it's supposed to close to let the coolant warm up. Another possibility is low antifreeze levels; when I popped the hood, the fluid was indeed below the minimum line. The mechanic also mentioned that there might be air in the cooling system, which needs to be bled out. The worst-case scenario is a faulty coolant temperature sensor, where the engine is actually warm but the gauge still shows a cold state. Especially in summer when using the AC, if the radiator fan is stuck on high speed, cold air keeps blowing in, making it impossible for the temperature to rise. My advice: don't push it—head to the repair shop ASAP. Otherwise, engine wear will get worse, and repairs will cost even more.
