Back up warning sonar problem

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Doctor Mike

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Sep 8, 2018
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Need some help please.
I live in north east, it has been exceedingly cold last few days but dry. All of a sudden , it appears that at least one of my rear sonar backup detectors is going off continually unprovoked . I thought intially they might be dirty so cleaned them thoroughly but the problem persists. Could the extreme cold have caused this? Additionally , window washer not working either though solution says it’s good to -20F and it hasn’t been that cold.
Any ideas , or is it back to the stealer time?
 

brianh87

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Mar 3, 2019
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Pittsburgh, PA
Mine was actually doing the same thing the past few days in the cold. It seemed like condensation kept building up on mine and freezing. After clearing them a few times all was well.
 
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