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defroster sound HELP

1009 Views 4 Replies 3 Participants Last post by  TheGuardian
When I switch on my defrosters I get a load moan from under the dashboard. It sounds like a pump straining. It starts quite builds then stops then starts again. It only happens when the defrosters are on. Does anyone have any idea?
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it keeps going i think the sound is coming from the compressor
i have found the problem it is in the in cabin filter i can't figure out how to get it out to clean it but i was able to blow most of it out. how do you get that flirer out on a 2001 frontier
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