2009 Chevrolet Cobalt Heater Isn't Working

Common Causes of Heater Issues in Your 2009 Chevrolet Cobalt 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 2009 Chevrolet Cobalt 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 are the common problems that could cause the heater to stop working in a 2009 Chevrolet Cobalt?

When the heater in your 2009 Chevrolet Cobalt stops working, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the first things to check is the coolant level; low coolant can lead to insufficient heating, so ensure that your reservoir is filled and inspect for any leaks in the system. If the coolant level is adequate, consider the possibility of air pockets trapped in the cooling system, which can obstruct coolant flow to the heater core. In some cases, the heater core itself may be damaged or clogged, preventing heat from entering the cabin. Additionally, an airlocked cooling system can disrupt the circulation of coolant, leading to a lack of heat output. Lastly, a malfunctioning thermostat can interfere with the regulation of coolant flow, further complicating the heating issue. By systematically checking these components, you can identify the root cause and take the necessary steps to restore warmth to your vehicle.

How urgent is it to address the non-functioning heater in a 2009 Chevrolet Cobalt?

Addressing a non-functioning heater in a 2009 Chevrolet Cobalt 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 uncomfortable driving experience, especially in cold weather, where maintaining a warm cabin is essential for both driver and passenger safety. Moreover, neglecting this issue can result in further complications, such as a failing water pump, which may lead to costly repairs down the line. The heater plays a vital role in defrosting windows and maintaining visibility, making it imperative to resolve any heating issues promptly. By addressing the heater's malfunction early, you not only ensure a comfortable ride but also prevent potential safety hazards and expensive repairs, making it a wise decision for any DIY enthusiast.

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