Yes I did and the service guy just referred to the very general manual that is supplied by heartland. and really did not want to take the time to look and see how to access the relay control power (which he was not even sure was).
It seems taht heartland is very dependent on the owners to figure out through trial and error or through having to go to RV centers and pay for service and then report back in these forums and wikkis instead of having the information at hand. I am totally amazed there is no user manual specifically for my MPG 185 that actual tells where things are located and how to access them. Instead, I get the very general instruction to "LOcate" such and such and flip thew switch or light it and if you do not do it right you will catch the place on fire... etc... W/out telling you where to look, what it looks like, how to access it and how to do it.
Also, For each part, like the Water heater, It all depends on what type you have, which again the very general Heartland manual does not tell you, so consequently I have been w/ hot water this entire week of camping and hooked up to electricity !