Since this is all happening under the carpet, it can quickly get out of control without you ever knowing. As this moisture stays trapped in your carpet it can start to corrode the floor pan in your car. As the coolant leaks onto your floor it will soak into your carpet and the padding.

First, when your car isn’t warmed up yet, the coolant will make a mess on your floorboards and possible start the process of corrosion. Having coolant leaking into the cabin of your vehicle can cause all sorts of problems. Even if you have an older vehicle with the heater core outside the cabin, leaking fluid can still find its way into the cabin through the ventilation ducts. On most new vehicles, the heater core is inside the cabin of the vehicle. What are the symptoms of a leaking heater core?Ī leaking heater core usually will cause a much more annoying leak. The purpose of a heater core is to bring warm coolant into the cabin of your vehicle so the ventilation air can be warmed up allowing your car’s defroster and heater to work properly. Sure, that isn’t the best for the environment and it can make a mess in your driveway or the parking lot at work, but at the end of the day as long as you keep your fluids topped off, you can keep driving your vehicle relatively comfortably.

Almost any leak in your car is an external leak, meaning the leaking fluid will just leak out onto the ground. Having a leaking heater core can be one of the most frustrating leaks you can have in your vehicle.

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