Hello, I am new to both RVs and full timing, but here I am! I'm currently having an issue with our hot water heater. It lights and it works but the water is consistently about 70-80 degrees (I'm estimating). It doesn't get hot enough to melt butter off a dish! This hasn't been SUCH an issue over the summer because it's 100+ degrees where we live and a lukewarm shower feels good but once winter hits we're going to be miserable. The "hot" water actually lasts a fairly long time, the only issue is the temperature. It is a Suburban model SW6DE I believe. The owners manual says that the thermostat is preset to keep water between 100 and 180 degrees but we have yet to have anything over 100. Any suggestions?