I previously reported all was well BUT it is not. A recent camping trip
showed me problems again. New batteries seemed at first to help but that was incorrect.. Same thing started to happen again.. With nothing turned on, batteries connected and pedestal power applied, DC Voltage read 13.6 VDC. Then within 30 seconds of turning on
either the water pump or furnace, everything dimmed or slowed down..
I the disconnected batteries and again applied pedestal power to the trailer.. as long as nothing (pump or furnace) was on DC Voltage remained about 13.5 vdc.. The minute I turned on wither the pump or furnace, DC voltage dropped to 7.5vdc, overhead lights flashed on/off and furnace or water pump started rapid on/off cycling...
Given this, I now believe the WFCO WF-8955PEC has failed failed and needs a new power converter circuit assy. Am now searching for an exact fit / drop in replacement power converter circuit assembly at a reasonable cost.