2015 Mitsubishi Lancer Heater Isn't Working

Common Causes of Heater Issues in Your 2015 Mitsubishi Lancer 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 2015 Mitsubishi Lancer 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 2015 Mitsubishi Lancer?

When diagnosing the heater issue in your 2015 Mitsubishi Lancer, 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 impact heating performance. If the coolant level is adequate, proceed to inspect the thermostat, which regulates the flow of coolant; a malfunctioning thermostat can prevent the heater from operating correctly. Next, examine the heater core for any signs of clogs or leaks, as these can obstruct the flow of hot coolant necessary for heating. Additionally, verify that the heater control valve is functioning properly, allowing hot coolant to enter the heater core as needed. It's also crucial to check the blower motor, which is responsible for circulating warm air into the cabin; ensure it is operational. Lastly, inspect the HVAC controls for any potential issues that might affect the heater's performance, and look for any coolant leaks that could compromise the system. By following this diagnostic approach, you can effectively identify and address the heater issue in your vehicle.

What are the common problems that could cause the heater to stop working in a 2015 Mitsubishi Lancer?

When your heater stops working in a 2015 Mitsubishi Lancer, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty thermostat, which may prevent the engine from reaching the necessary temperature for heating. Additionally, coolant leaks can significantly impact the system, as they lead to insufficient warm coolant circulating through the heater core. If the heater core itself is clogged or malfunctioning, it can restrict the flow of hot coolant, resulting in cold air blowing into the cabin. Another potential issue is a failing blower motor, which is responsible for pushing warm air into the vehicle; if it’s not functioning, you won’t feel any heat. Lastly, air pockets in the cooling system can disrupt the circulation of coolant, further contributing to the lack of heat. By addressing these common problems, you can take the first steps toward restoring warmth to your Lancer’s interior.

How urgent is it to address the non-functioning heater in a 2015 Mitsubishi Lancer?

When faced with a non-functioning heater in your 2015 Mitsubishi Lancer, it is crucial to recognize the urgency of the situation. A malfunctioning heater not only compromises your comfort during cold weather but also poses significant safety risks. Without a working heater, defrosting your windows becomes challenging, which can severely impair visibility and increase the likelihood of accidents in icy or rainy conditions. Moreover, neglecting this issue may signal deeper problems within your vehicle's cooling system, potentially leading to overheating and costly engine damage if left unaddressed. Timely repairs not only enhance your driving experience but also prevent more extensive and expensive repairs in the future. Therefore, prioritizing the repair of your heater is essential for maintaining both your comfort and the overall health of your vehicle.

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2015 Mitsubishi Lancer Heater Not Working: Causes & Fixes