2012 Kia Sorento Heater Isn't Working

Common Causes of Heater Issues in Your 2012 Kia Sorento and How to Resolve Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
31% chance it's the
Heater Blower Motor
0%
18% chance it's the
Heater Blower Motor Resistor
0%
51% chance it's
Something else
The most common reasons a 2012 Kia Sorento heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
  • Heater Blower Motor: A faulty heater blower motor can result in inadequate airflow or no air coming from the vents, often due to electrical issues or motor failure.
  • Heater Blower Motor Resistor: A faulty heater blower motor resistor can cause inconsistent fan speeds or complete failure of the blower motor.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the steps to diagnose why the heater isn't working in a 2012 Kia Sorento?

To diagnose why the heater isn't working in your 2012 Kia Sorento, start by checking the coolant level, as low coolant is a common issue that can prevent warm air from blowing. If the coolant is adequate, look for air pockets in the cooling system, which can disrupt the flow and affect heating performance. Next, inspect the thermostat; a malfunctioning thermostat can lead to improper temperature regulation. If these initial checks do not reveal the problem, examine the heater blower motor and its resistor, as a failure in these components can stop the heater from functioning altogether. Finally, assess the heater core for any blockages or leaks, as a faulty heater core can also hinder warm air production. By following this diagnostic approach, you can systematically identify and address the underlying issues affecting your vehicle's heating system.

What are the common problems that could cause the heater to stop working in a 2012 Kia Sorento?

When troubleshooting a heater that has stopped working in a 2012 Kia Sorento, it's essential to consider several common problems that could be at play. One of the first things to check is the coolant level; low coolant can significantly impact heating performance. If the coolant is adequate, inspect for air pockets in the cooling system, as these can prevent proper circulation. A faulty heater core is another potential culprit, as it can block the flow of hot coolant necessary for heating the cabin. Additionally, an airlocked cooling system or a malfunctioning thermostat can disrupt the heating process. Electrical issues, such as a blown fuse, bad relay, or a malfunctioning blower motor, may also be responsible for the heater's failure. Lastly, examine the climate control unit for any defects, as well as the electrical connectors and wiring, to ensure everything is functioning correctly. By systematically checking these areas, DIYers can effectively diagnose and address the heating issues in their Kia Sorento.

How urgent is it to address the non-functioning heater in a 2012 Kia Sorento?

Addressing a non-functioning heater in your 2012 Kia Sorento should not be overlooked, as it can lead to significant discomfort during cold weather and hinder your ability to defrost the windshield, which is crucial for safe driving. A malfunctioning heater often signals underlying issues within the engine's cooling system, such as low coolant levels or blockages, which can escalate into more severe engine problems if left unaddressed. Ignoring these symptoms may not only compromise your comfort but also affect the overall efficiency of your vehicle's heating and cooling systems. Therefore, while it may not seem like an immediate emergency, it is essential to prioritize the repair of your heater to ensure a safe and pleasant driving experience, especially during colder months. Taking timely action can prevent further complications and maintain the functionality of your Kia Sorento.

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2012 Kia Sorento Heater Not Working: Causes & Solutions