2020 Subaru Outback Heater Isn't Working

Common Causes of Heater Issues in Your 2020 Subaru Outback and How to Resolve Them

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Reviewed by
Aisha
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 2020 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 circulation in the cabin, affecting the heating system's performance.
  • 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 steps should I take to diagnose the heater issue in my 2020 Subaru Outback?

When diagnosing a heater issue in your 2020 Subaru Outback, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex problems. Begin by checking the coolant level, as low coolant can severely impact the heating system's efficiency. If the coolant is adequate, the next step is to inspect the thermostat, which plays a vital role in regulating coolant flow; a malfunctioning thermostat can lead to inadequate heating. Following this, examine the heater core for any clogs or leaks, as these can obstruct the flow of warm air into the cabin. Additionally, ensure that the blower motor is operational, as a defective motor can prevent proper airflow. It's also important to verify that the heater controls are functioning correctly to direct hot air where needed. Finally, inspect the cooling system for any leaks that might be affecting heater performance. If these initial checks do not resolve the issue, it may be time to consult a professional mechanic for further diagnosis. By systematically addressing these areas, you can effectively troubleshoot and potentially resolve the heater issue in your Subaru Outback.

What are the common problems that could cause the heater to stop working in a 2020 Subaru Outback?

When troubleshooting a heater that has stopped working in a 2020 Subaru Outback, it's essential to consider several common problems that could be at play. Start by checking the coolant levels, as low coolant can hinder the system's ability to circulate and heat air effectively. If the coolant is adequate, the next step is to inspect the thermostat; a malfunctioning thermostat can disrupt temperature regulation, leading to heating issues. Additionally, examine the heater core for any clogs or leaks, as these can obstruct the flow of hot coolant necessary for heating the cabin. Don't overlook the blower motor, as a failure here can result in insufficient airflow through the vents, leaving the cabin cold. Lastly, investigate any potential electrical issues, such as blown fuses or a faulty control panel, which can also prevent the heater from operating properly. By systematically addressing these areas, you can identify and resolve the issue, ensuring your Subaru Outback's heater functions effectively.

How urgent is it to address the non-functioning heater in a 2020 Subaru Outback?

Addressing a non-functioning heater in a 2020 Subaru Outback is not just a matter of comfort; it is a critical safety concern that should be prioritized. When the heater fails, it can lead to an uncomfortably cold cabin, which is particularly dangerous in winter months when temperatures drop significantly. Prolonged exposure to cold can result in serious health risks such as frostbite or hypothermia for both the driver and passengers. Moreover, the heater plays a vital role in defrosting the windshield, and without it, visibility can be severely compromised, increasing the likelihood of accidents. Additionally, neglecting a malfunctioning heater can exacerbate underlying issues within the vehicle's heating system, potentially leading to more extensive and costly repairs in the future. Therefore, it is essential for DIY enthusiasts to recognize the urgency of this issue and take immediate action to diagnose and resolve the problem, ensuring both safety and comfort while driving.

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