what I noticed with my radiator fans is that it would run constantly on high if the ambient air temp sensor isn't plugged in but if I plug it in the fans don't turn on not even during cold start. All of the relays and fuses are operating but can't find the issue.
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I would take it to an AutoZone and get a free computer readout to try to isolate the problem.
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@willx do the fans eventually turn on while you run the engine? What exact year and engine size is your Passat?
由 oldturkey03 完成的
No they won't and it's a 2015 1.8
由 Will 完成的