2014 Subaru Outback Heater Isn't Working

Common Causes of Heater Issues in Your 2014 Subaru Outback and How to Resolve Them

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Reviewed by
Bo Fader
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 2014 Subaru Outback 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 initial steps should I take for a non-working heater in a 2014 Subaru Outback?

When faced with a non-working heater in your 2014 Subaru Outback, it's essential to adopt a systematic diagnostic approach. Begin by checking the coolant level, as insufficient coolant can hinder the heater core's ability to generate heat. If the coolant level is adequate, inspect the cooling system for air pockets, which can disrupt the flow and prevent proper heating. Next, examine the heater core itself; a malfunctioning core may require replacement if it fails to deliver heat even after addressing airlocks. Additionally, ensure that the thermostat is functioning correctly, as a faulty thermostat can impede coolant flow and affect heating performance. If you experience inconsistent temperatures from the vents, investigate the blend door actuator, which regulates air distribution within the HVAC system. Don't overlook the heater blower motor, as it is crucial for circulating warm air into the cabin; a non-functional motor will result in inadequate heating. Lastly, verify the water pump's efficiency, as a malfunctioning pump can disrupt coolant circulation, and consider cleaning or replacing the cabin air filter to enhance airflow. By following these steps, you can effectively diagnose and potentially resolve the heating issues in your Subaru Outback.

What are the common problems that could cause the heater to stop working in a 2014 Subaru Outback?

When the heater in your 2014 Subaru Outback ceases to function, it can be frustrating, especially during colder months. One of the first things to check is the coolant level; low coolant can significantly hinder the heater's performance, so ensure it is topped up to the recommended level. Additionally, air pockets in the cooling system can disrupt the flow of coolant to the heater core, leading to insufficient heat. If you suspect this, bleeding the cooling system may be necessary to remove any trapped air. Another common culprit is a malfunctioning thermostat, particularly if the bottom bypass valve is stuck, which can restrict hot coolant from reaching the heater. Furthermore, inspect the heater core for any blockages or damage, as these can prevent heat from circulating into the cabin. Lastly, don’t overlook the blower motor; issues such as a blown fuse, faulty relay, or a malfunctioning control module can also result in a non-operational heater. By systematically checking these components, you can identify and resolve the issue, ensuring your Subaru Outback's heating system operates efficiently.

How urgent is it to address the non-functioning heater in a 2014 Subaru Outback?

Addressing a non-functioning heater in a 2014 Subaru Outback is not just a matter of comfort; it is a critical safety concern that should be prioritized. Ignoring the symptoms of a failing heater can lead to more severe issues, such as a malfunctioning water pump, which may result in costly repairs down the line. Additionally, a heater that fails to perform can stem from various underlying problems, including a faulty heater core, low coolant levels, or a clogged cooling system. Each of these issues can exacerbate the situation, leading to further complications. For instance, if the heater fan is broken, it will fail to circulate warm air, leaving occupants in a cold cabin, which is particularly dangerous in winter conditions. Moreover, a blocked heater core can prevent hot coolant from reaching the cabin, rendering the heater ineffective. Therefore, it is crucial to address any heater malfunctions promptly to avoid safety risks and ensure a comfortable driving experience, especially in colder weather.

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