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Weird droning noise
Hoping someone can give me a pointer on a weird one!
I've been hearing a droning noise on the cabin recently which seemed to fluctuate or resonate with engine revs. As it's been quite hot recently, and climate control has been employing air-conditioning, I was thinking that it may be A/C compressor related. After a bit of experimentation, it does appear to be climate control related but not A/C specific, i.e. when i switch c/c off, no noise. It doesn't seem to be the blower itself, no change when cycling through speeds.
Does anyone have any ideas? Seems to be getting louder and driving me mad!
Thanks for any suggestions:-)
Currently in abou27's garage:
2007 Renault Laguna GT175 (2.0dci), 1998 Renault Ares 4.0l td