2019 Subaru Impreza Heater Isn't Working

Common Causes of Heater Issues in Your 2019 Subaru Impreza and How to Resolve Them

Find Repair Location
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 2019 Subaru Impreza 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 are the initial steps to diagnose the heater issue in a 2019 Subaru Impreza?

When diagnosing a heater issue in a 2019 Subaru Impreza, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by checking the coolant level in the radiator, as insufficient coolant can significantly hinder heater performance. Next, inspect the thermostat to ensure it is functioning correctly, since a malfunctioning thermostat can prevent the engine from reaching the optimal temperature needed for effective heating. Following this, examine the heater core for any signs of clogs or leaks, as these can directly impact the heating system's efficiency. Additionally, assess the heater controls to confirm that all settings, including temperature and fan speed, are operational. Finally, look for any coolant leaks around the vehicle, as these can lead to a drop in coolant levels and further complicate heating issues. By methodically working through these steps, you can effectively identify the root cause of the heater problem and determine the necessary repairs or maintenance for your Subaru Impreza.

What are the common problems that could cause the heater to stop working in a 2019 Subaru Impreza?

When troubleshooting a heater malfunction in a 2019 Subaru Impreza, it's essential to consider several common problems that could be at play. One of the primary issues is a faulty thermostat, which can prevent the engine from reaching the optimal temperature needed for effective heating. Additionally, coolant leaks can significantly impact the heating system by reducing the amount of coolant available for heat transfer, leading to inadequate warmth in the cabin. Another potential culprit is the heater core; if it becomes clogged or fails, hot coolant cannot circulate properly, resulting in a lack of heat. Furthermore, a malfunctioning blower motor can hinder the distribution of warm air, leaving the cabin cold. Lastly, air pockets in the cooling system can disrupt coolant flow, further complicating heating issues. By understanding these common problems, DIY enthusiasts can better diagnose and address heater issues in their Subaru Impreza.

How urgent is it to address the non-functioning heater in a 2019 Subaru Impreza?

When faced with a non-functioning heater in your 2019 Subaru Impreza, it is crucial to act swiftly to avoid a range of potential issues. A malfunctioning heater not only compromises passenger comfort during chilly weather but also hinders your ability to defrost windows effectively, which is vital for maintaining visibility and ensuring safe driving. Moreover, the heater is intricately linked to the vehicle's cooling system; neglecting this problem could lead to overheating, risking serious engine damage. Even in warmer months, addressing the heater issue promptly is wise, as it ensures the system is ready for use when temperatures drop. By prioritizing the repair of your heater, you safeguard both your comfort and the integrity of your vehicle, making it an essential DIY task that should not be delayed.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.