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Old 08-07-2018, 01:05 PM   #5
FC
Solving problems
 
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Join Date: Oct 2003
Carmudgeonly Ride: M5 / 718 GTS / Cooper S / GTI / LR4
Location: Metro Boston
Posts: 25,216
I was thinking something along the lines of what JV said. Does it stop working after operating for a while?

It sounds as if something is heating up over time and eventually affecting function. Was the car parked in the sun for a while the time it did not work, but not on the days when it worked?
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