Happened to us too. Our Progessive surge portector had a burn in it too. It was replaced but we were told they would NOT do it again. Said we did not have it pluggen in correctly.
Herk is right and has some greta points. We always check the power before we level the trailer or disconnect... just in case we have a bad power stand.
We are thinking about putting a bucket over or around our surge protector to keep water and dirt out.
2012 Ford F-250 King Ranch Super Crew Cab 4x4
2014 Work & Play 25ULA
Paula Drake, Ken Cooksey, Sunny Delight, Valor & Scarlet Begonia