The thermostat in your car serves the purpose of regulating the temperature so it stays at a desired level.  To achieve this, it controls the cooling and heating mechanisms that control the heat flow throughout the system.  The thermostat manages the amount of coolant in the internal combustion engine.  A thermostat is necessary in all liquid cooled engines.

If your thermostat isn’t working correctly it may be due to several reasons.  First, the thermostat may be affected if the water pump is failing.  The thermostat may also be affected with an overheated engine or if coolant is leaking.

Make sure you have a mechanic look at your thermostat on a regular basis.  It plays a key position in keeping your engine cool, so it needs to be replaced every few years.

Also, if you don’t replace your thermostat when it’s time, you may find yourself with additional problems, such as emission problems, knocking with acceleration, and poor fuel-economy, and chances are you will find yourself calling your road service program.