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The Mercedes C-Class W204 heater blower may stop working due to various reasons like a loose blower motor or failure of the heater fan. Being uncomfortable due to a malfunctioning air conditioner is never enjoyable. It's essential for the AC to function properly for your comfort. Issues with this component will arise at some point, such as a faulty motor, an inaccurate thermostat, or a foul odor coming from the vents. Problems like a loose fan, a Freon leak causing sweating, or annoying noises from the AC may occur. Loose mounting bolts or a faulty compressor can also be frustrating. It's crucial to address these issues promptly to maintain your peace of mind.
If the heater fan in your Mercedes C Class W204 isn't functioning, it's recommended to inspect the resistor as a possible cause.