So the mechanic tells you that you need a new Chrysler heater core if you want to have any opportunity to thaw your car, and yourself, out this winter. You're left wondering exactly what a Chrysler heater core is, and why it costs so darn much to have replaced. Allow us to elaborate. The heater in your car operates using hot water circulated through a small radiator, the Chrysler heater core. The system is not unlike a boiler/radiator system that you'd find in an older home-the engine would be the boiler and the Chrysler heater core would be the radiator. Not surprisingly, the same types of problems that can occur with a home hot water heating system can occur within your automotive heating system and the Chrysler heater core itself. Leaks are the most common malady affecting the Chrysler heater core, with clogs following close behind. A leaking Chrysler heater core is fairly serious, so if you find green coolant inside your vehicle or experience high humidity inside the car, the Chrysler heater core is suspect. If you just can't dial up enough heat no matter how high you turn the knob, a clogged Chrysler heater core may be the problem, although the heater water valve fails more frequently. In either case, however, a new Chrysler heater core is the only way to solve the problem, which brings us back to our mechanic friend and his rather significant bill. Does a Chrysler heater core really cost that much? No-the part is not terribly expensive. Unfortunately, the Chrysler heater core is usually buried inside the dash requiring several hours of intensive labor to access. So if it makes you feel any better, your technician will earn his money replacing your Chrysler heater core!