Hi, could use some advice before i call in the HVAC guys..
our new house has hydro-air and central air. i've noticed this summer
that the 2 zones aren't working correctly - it seems when either the
upstairs or downstairs thermostat calls for cold air, air is pumped through
every vent in the house. i do hear a noise from the basement that i think is
a damper closing, but there's no doubt that air is coming from all vents.
so, my question is, if upstairs is calling for ac, shouldn't it only