I to have fireplace use it a lot. So i have to turn fan switch for zone 1 turned on before the bathroom fan will run right that is the hi low button above the driver where eplex stat is
Mr bob have a question for you if i may ask when you turn your your furnace on. zone 3 is furnace plus turn on 1 and 4. mine zone 2 no furnace selection . does your vanity fan run ? i am having trouble with my vanity fan and my bathroom fan seems odd they both do not come on called newmar not much luck there strange part i can put 12 volts to fans and will run is there something i do not have turned on i can feel they are getting the heat to them but no fan spin