The transfer switch on my 04 Monaco Sig hums when on shore power or on the gen. power. It has an Esco Power 50 switch and I found the manufacture's web site trouble shooting page. It says I need to remove the contacts as they have dust on them
and clean them. DUST ON THEM YOU SAY
, I guess the DW has 1 more thing to dust now... Has anybody else had this problem and what did you do to fix it? Is this an indication of switch failure in the future? I would not think dust would make a difference. Also should I put Dielectric Grease on the contacts for better contections.