4 zone gas heat... Moved thermostat and now all zones are acting as if on one thermostat n the automag board connections r reading right... All 3 wires are connected on the oolder thermostat... The zone moved seemed to get the most heat though... Don't know?

With 4 zones you have 4 thermostats. You changed one of them? I can only guess you wired up something wrong.

If you have automag zone valves, there's a good chance you've fried a rectifier.