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Interior heating - Heat Exchanger Function

Through a heat exchanger, it is possible to use the heat of the engine removed by the cooling water for heating the interior of a vehicle. Accordingly, heating is only possible only with a warm engine, or else it will require an additional heater for heating a cold engine. In what is often also referred to as the heating radiator, the the warm cooling water passes through a cooling coil, which comes with slats or fins, to produce the largest possible surface for optimal heat transfer.A fan blows cold air along the slats and becomes heated while the cooling water is cooled down. The heated air then passes through openings and air nozzles in the interior. A controllable valve lets the heated air mix with cold air in any ratio, so that allows you to set a desired temperature inside the car through the control of the heating.The problem with the heating in an electric car with an electric motor is that there is not enough waste heat generated in the heating mode with conventional heat exchangers. A possible solution is the use of a heat pump.Well-known manufacturers of heat exchangers for the interior heating include AKS DASIS, PRASCO, VAN WEZEL, HELLA and VALEO.

If the heat exchanger is defective

The heat exchanger is not subject to immediate wear, however, after a long time operating the heating power can decrease due to contamination on the inside, or leaks in the housing can occur. The latter leads to a loss of cooling water and frequently high levels of humidity in the interior due to the exiting and evaporating cooling water. It can also cause an unpleasant odour. A clogged heat exchanger can be cleaned sometimes, otherwise a replacement is usually necessary.

Replacing the defective heat exchanger

With the necessary technical skill and some technical knowledge, changing a heat exchanger is generally possible on your own. However, in some vehicle models it could be a difficult job, especially when the heat exchanger is only accessible through of the footwell of the car. Detailed instructions for the respective vehicle model can be found on the Internet. You can find a new heat exchanger in OEM quality at a low price in our online shop.We also carry many other high quality parts from reputable manufacturers, for many car makes and models.