Spent good part of the day trying to adjust how the Espar mod operates based on what item is controlling it. Yesterday while testing out the water heaters control of the Espar, the water heated great but it also was 90 degrees in the coach. The way to fix this is to have the water heater only turn on the Espar and not the dash fan. But still have the fan turn on with the normal thermostat. Also, I'd like to turn in the Espar heater from the dash manually.
So, ran more wires, used a few relay's, and tried many different ideas. I believe I have it all working, but need one more relay to complete the job. That way the water could be heated with the Espar in the summer without heating the coach.
Slowly getting closer - soon the outside temps will gives me a good test.