If you are wondering what component supplies and controls the amount of heat inside the passenger cabin of your Geo, then wonder no more since this task is performed by your Geo heater core. The heater core is like the radiator which is a part of the cooling system. It is used in heating the cabin of your auto to keep you warm during cold weathers. With the use of the heated coolant from your auto's engine, the heater core releases heat that is then blown into the passenger compartment of your auto. This part is usually located under the dashboard of your Geo. It consists of a conductive piping that is coiled within aluminum fins to increase the surface area. When the heated coolant reaches the heater core through the hoses, the coolant enters the device at the inlet, travels to the coiled piping, then exits at the outlet and returns to the water pump. You can control the exact amount of heat released by the heater core inside your passenger cabin with the use of heater controls. This part will not need regular maintenance; you just watch for some signs that will tell you if it is already failing on you. The symptoms of a faulty heater core include coolant on the floor, strange smell, and poor heater output. If these symptoms occur, have the heater core checked since the problem may get worse. Check out our selection of reliable Geo heater cores for your optimum driving convenience.