I'm brand new to the RV world, I bought a 2007 Chevy Gas Chateau 28aa. I have a problem with 2 issues, one I'm working on now is the HWH leveling system. When I turn the Control box on, the power on light of course comes on but so does the left yellow level sensor light. I have extended the jacks on the left side to the point of picking up the wheels and the light will not go off. Where can I begin to look to find out what/why this light is staying on. I've read something about the Leveling Sensor but I have yet to be able to locate it. Any help would be greatly appreciated. Thanks!