2018 Lincoln MKT Heater Isn't Working

Common Causes of Heater Issues in Your 2018 Lincoln MKT and How to Resolve Them

Find Repair Location
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 2018 Lincoln MKT 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 steps to diagnose the heater issue in a 2018 Lincoln MKT?

To effectively diagnose a heater issue in your 2018 Lincoln MKT, start by checking the thermostat, as a malfunctioning thermostat is often the simplest and most common cause of heating problems. Next, inspect the coolant level; low coolant can significantly impact the heater's performance, so ensure it is at the recommended level. If the coolant is sufficient, examine the heater core for any signs of clogs or leaks, as these can severely hinder heating efficiency. Following this, assess the heater control valve to confirm it is functioning properly, as any issues here can disrupt the flow of hot coolant to the heater core. Additionally, test the blower motor to ensure it is operational, as a faulty blower can prevent warm air from circulating in the cabin. Finally, if the problem persists, use a diagnostic scanner to check for error codes that may indicate specific issues within the heating system. By systematically following these steps, you can effectively identify and address the heater issues in your Lincoln MKT, ensuring a comfortable driving experience.

What are the common problems that could cause the heater to stop working in a 2018 Lincoln MKT?

When your 2018 Lincoln MKT's heater stops working, it's essential to understand the common problems that could be at play. One of the first things to check is the thermostat, as a malfunction can prevent the engine from reaching the necessary temperature for effective heating. Additionally, low coolant levels can significantly impact the heater's performance, so ensuring that the coolant is at the appropriate level is crucial. Another potential issue is the heater core, which can become clogged or develop leaks, obstructing the flow of hot coolant and leading to inadequate heating in the cabin. Furthermore, a faulty blower motor may be the culprit if warm air isn't circulating, even when the heating system is operational. Lastly, air pockets in the cooling system can disrupt coolant flow, further complicating the heating process. By systematically addressing these common issues, you can effectively diagnose and resolve the heater problems in your Lincoln MKT, ensuring a warm and comfortable driving experience.

How urgent is it to address the non-functioning heater in a 2018 Lincoln MKT?

Addressing a non-functioning heater in your 2018 Lincoln MKT is crucial for both comfort and safety, especially during the colder months. A malfunctioning heater not only makes driving uncomfortable but can also lead to dangerous situations, such as fogged-up windows that impair visibility. This is particularly concerning in winter conditions where clear sightlines are essential for safe driving. Moreover, neglecting this issue can result in more severe damage to the heating system, leading to costly repairs down the line. Therefore, it is imperative to have the heater inspected and repaired promptly by a qualified mechanic or dealership. Taking swift action ensures that your vehicle remains comfortable and safe, allowing you to drive with confidence regardless of the weather.

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.

2018 Lincoln MKT Heater Problems: Causes & Solutions