look through your paper work or on the net for the manufacture and give them a call. I've had a few issues over the years and they have always been extremely helpful. You can start here Hurricane Heating Systems | International Thermal Research
Also I know they had a recall on one of the boards and they will be happy to send you one. I've had mine replaced.
I also found out that all zones must be set on furnace on the thermostat both the in house switches above the front door set to "on" and the fans turned to some "on" position.