Auto Repair Mint Hill: Heater Core Repair

I think my heater core is not working!  Oh no!  If you are in Mint Hill or the surrounding area and need your auto repaired by qualified professionals, Manchester Auto and Tire of Mint Hill is the place to come.  We will have one of our certified technicians run tests on the vehicle to ensure your car is properly diagnosed so you do not end up spending money on unnecessary auto repairs.

Animated Heater Core.

A simple heater core.

What is a heater core? A heater core is a device that uses coolant to heat the cabin of the vehicle. The heater core works by having coolant, already hot from the engine, pass through a small radiator (called the heater core), making the core hot. A fan blows the heat generated via the coolant into the cabin, warming the passengers.

What are signs my heater core does not work? One of the most obvious is that your car’s heater does not work, but that isn’t the only sign. Sometimes water can leak onto the floor in the passenger side, or the car can fog up the windshield quickly. Sometimes, the car may even smell sweet.

What happens when my heater core doesn’t work? Though beneficial when working properly, a broken heater core can be a major disadvantage. Cars without heat are not only unpleasant to drive in the winter, but are less valuable.

Since the heated air the core generates cools off as it is blown into the car, the heater core must be located very close to the cabin. Many times, the heater core is located under the radio or by the glove box. Due to it’s positioning, the cabin’s dashboard almost always must be taken apart to remove it.

We  recently performed a heater core replacement on a 2005 Jeep Grand Cherokee Laredo. The process begins by carefully taking off the dashboard, without damaging the plastic, radio, gauges, or wires. Though time consuming, it is crucial to take  time when disassembling the dashboard as to not break any crucial components. Once  we have  completely taken apart the dash, we can  now access to the heater core. At this point  you must be careful, as there could be coolant still in the core from previous use.

Manchester Auto and Tire of Mint Hill where your interior will look good as new

Heater core repair.

Now with access to the heater core, we remove it. The coolant is drained from the vehicle. We still have to be careful as there can still be some coolant left in the core itself. Next we remove the tubes pumping coolant into the heater core, then unbolt the core itself from the car. A visual inspection of  the core usually finds the issue. This one happens to be leaking.

Once the old heater core is removed and the new one is set into place, we run some water through the new heater core to make sure it is not defective. If everything checks out OK, it is bolted into place, then the hoses are reattached. Now begins the process of reassembling the dash. We check the electronic database to see exactly how it should be reattached, so we do not rely entirely on memory. From there we carefully attach wires, the radio, the gauges, and so on, putting the car back together again.

Manchester Auto Repair in Mint Hill Service Staff exemplary service

heater core.


Now we refill the car with coolant.  Turn on the heat in the car to test the new  heater core. It works, and the air being blown is warm. Success!  If you  think you have a heater core problem or need any type of auto repair in Mint Hill, please feel free to stop by Manchester Auto and Tire of Mint Hill and have your car checked out.  We are an award winning facility and the top shop for auto repair in Mint Hill. Call us at 704-545-4597 and schedule an appointment today.

Ken Manchester