Auto mechanic shops and dealership service centers can service and replace heater cores. Owing to the complexity of accessing the part in most automobiles, experts do not recommend automobile owners attempt to replace their own heater cores.
Heater cores tend to require complete replacement when they fail as a result of clogging or leaking. The part, which looks like a small radiator, pulls heat from antifreeze and transfers it to the cab of a vehicle, providing heat for occupants. To access it, mechanics must usually remove a vehicle's dash, which results in many hours of labor and requires specific knowledge of the model of vehicle.