This qualified prospects me to suspect the pop-up wiring. For starters, pop-ups are notorious for owning inadequate ground connections, so be sure the light fixtures are very well grounded, and that there is no corrosion on the bottom connections or free wires. If these are typically Okay, then it http://rvheaternotworking50594.blogsidea.com/10496071/rv-heater-not-working-for-dummies