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If it's a rapid clicking sound that becomes more rapid when the fan is turned up high, you probably have a foreign object like a leaf stuck in the blower.

It sounds like your Air door actuator or temperature actuator

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โˆ™ 2009-09-26 16:35:36
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Q: Why does the heater behind the dashboard make a clicking noise when the heater is turned on?
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Related questions

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