Well I am not familiar with your specific coach but......usually jacks and generator starter are powered from coach batteries......so if you left your batteries disconnected (or use/store not in use; or coach battery disconnect was not turned on; or the coach batteries are not charged, etc) then the converter probably tried to supply the juice for the jack pump motor..... and you "let the smoke out of it". Assuming the OEM converter is toast, check Progressive Dynamics web site to see if they have an equivalent 55 amp converter to replace your old one. You probably don't want (or need) a bigger converter since wiring/fusing limitations could cause you new headaches plus the physical size would likely not fit where your toasted converter now resides. Make sure your coach batteries are fully charged and use/store is on and usually when jacks are deployed it is recommended that the engine is running (alternator charging the coach batteries). Just a suggestion.
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