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Apr 29, 2016 - 12:18 PM
After talking to a tech at surge guard he stated that there is not a way to fix the humming sound, he said unfortunately you possibly had an electrical surge and the unit will need to be replaced in the near future.
Electrical > RV Surge Protection
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Apr 29, 2016 - 12:18 PM
View all Surge Guard 34560 Permanent RV Surge Protector 50 Amp Questions & Answers
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