HI I have a wave 3 heater in my northern -lite 10' 2 camper its sits near the door it has only been used a few times . thought i would try it today as its a new camper. temp out side was 36 degrees...
The entire pad should be lit. The pads are not cheap, about $100 as I recall. I suggest you call thier tech support Monday. They will instruct you on how to troubleshoot.