I figured it out.....no amount of powering down will reset it, I tried many things many times......the proper procedure is to hit the button on the control board that says setup next to it (only button on the control board, it is in my picture above) for 15 seconds, then hit the mode button for 5 seconds and that will clear the "call service" code which had my heater disabled. Mine went into lockdown because I have a long gas line and it was not able to get the air out in the 3 chances it gives itself to ignite. Hopefully someone else will find this useful, good luck. BTW, I am liking the new app, Raymote, that allows me to control my heater from anywhere....I can turn my heater up while I am at work so it is warm when I get home for example....