I looked in the mess..I did see something small on the right side wall (looking in) just next to the intellitec relay...with 2 wires on it but with my luck (which is about none), I didn't want to chance it...it went on once a few years ago when I checked on it in the dead of winter outside storage and it did work, but it has yet to come on since when I put it on standby...the bay dropped to 45 degrees when in Asheville and in Raleigh which isn't enough..but between the heated hose, the fireplace and the two furnaces going, the coach would roast me out.I also routed one of the furnace hoses above the grey tank where the shower drains...the radiant heat from the fireplace also helped...my water tank is insulated although in a separate bay, I did have extra heaters avail to put in the cargo bay just in case but with 45 degrees in the bay, I had no worries....This coach seems very well insulated....the water pump, access to tanks and such are right in the wet bay....