Disconnect the zone 2 thermostat wire and see if it does it. Also, push the reset button and hold it in for a minute to see if it clears any corruption the board may have.
I switched the zones but the problem follows the upper level. When it calls for heat, it also activates the lower level even if lower is off or set under present room temp. :furious:Might want to switch zone numbers. make the basement zone 1 and the other floor zone 2, and see if it still does it.
I agree. I went downstairs a few minutes age and just the upper level was lit so it can work correctly once in a while. It is tough to find a problem when it does that.Sounds like the problem is in that zone, its wiring.