OK, I want to first apologize for any confusion I might have caused, which comes from being frustrated of what's going on with my system, to which was happening, again, since we bought the house, 6 years ago, I have never touched any of the wires from the on the left of my system, (input side), I just the zone 1 [white wire] zone valve power on the left hand side (output side). looking over everything with clarity, this time around, I found that the water heater was actually tied into the same terminal as the t-stat, the two sharing the same T1 terminal, again, these wires were as they currently are, from the previous homeowner (senior citizens). I'm guessing, and asking, can this be my problem? when trying to remove the t-stat wire, from T1, to test for continuity (just in case the wires were cross touching, of course) i accidentally pulled out the water heater wire, again, from the same T1 terminal, and everything turned off. then an epiphany hit me. this may be my problem. So, looking at my system and hesitantly wanting to put the water heater wire into another terminal, which may finally solve THIS issue. my other issue is, if T1 (T-stat input) on, my system, controls Z1 (zone 1 output, zone valve), in what input terminal do i put the water heater wire, and will it have to control something on the output side? All wires mentioned is one white wire from each equipment, (T-stat, zone valve, water heater, etc.) while the other colored wire, red or blue, is in a 24 v terminal, on both sides.