I'm getting a clicking that sounds like a relay every 3-5 seconds or so coming from the heater hose bundle under the hood on the US drivers side up by he windshield (under the plastic cover that always breaks. New OEM unit. What should I be looking at for a cause?
That will be the heater valves - they continually open and close to control the heater-matrix temperature. Unfortunately some are quit noisy but operate fine....
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
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Someone does 3D replacement with earth magnets for that cover. Works and looks great.
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