Kylvätsketemperaturmätaren

Kylvätsketemperaturmätaren, often referred to as the coolant temperature gauge, is an instrument panel display in vehicles that indicates the temperature of the engine coolant. Its primary function is to alert the driver if the engine is overheating or operating too far below its optimal temperature range.

The gauge typically consists of a needle that moves across a numbered scale, with markings usually indicating "C" for cold and "H" for hot, or sometimes specific temperature ranges in degrees Celsius or Fahrenheit. The needle's position reflects the current coolant temperature. A normal operating temperature is generally in the middle of the gauge.

The sensor that feeds information to the kylvätsketemperaturmätaren is usually a thermistor, a type of resistor whose resistance changes significantly with temperature. This sensor is typically located in the engine's cylinder head or thermostat housing, in direct contact with the coolant. As the coolant temperature changes, the resistance of the thermistor changes, which in turn alters the electrical signal sent to the gauge. The gauge interprets this signal and moves the needle accordingly.

A consistently high reading on the gauge can indicate a problem such as low coolant level, a faulty thermostat, a clogged radiator, or a malfunctioning water pump, all of which can lead to engine damage if not addressed. Conversely, a consistently low reading might suggest a thermostat that is stuck open or an issue with the sensor itself. Regular monitoring of the kylvätsketemperaturmätaren is an important aspect of vehicle maintenance.