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my name is Billy.
Have you checked the damper to make sure it has opened fully?
Yes I am....a stuck damper can cause this and I wondered if you checked the physical damper in the duct yet
standing by...the damper must open fully which in turn trips an end switch telling the panel it is open.
the damper blades are in the duct, but the motor is in the small box
is there a line on the motor shaft?
Or can you take a pic and post here using the attach files link?
ok do you have the motorized close or spring return?....or what is the damper number
turn that zone off and watch if it returns closed.
The damper number is ***** an ARD
thank you, ***** ***** pressed purge override yet?
on right side of board...DATS terminals...are there wires on those 2 terminals?
This is indicative if a issue in the zone board.
If a sensor were present that would be our first choice but your system has no dats.
Do you have all 3 zones filled
How many zones do you have? (thermostats)
and the other 2 work fine?
Now when all 3 are asked to be open....do all 3 appear to open?
Can you identify what room has what damper?.....and also follow the wires from the zone panel to each damper
I assume now that 2 zones are open ac is on?
ok we need to find the 3rd damper
so on the zone panel..bottom row....you have only 2 zones wired?
let me gather my thoughts again....
so the master bed unit is working...(separate unit)
living room zone is working fine....
but a second zone on the panel is not?
but you watched the damper open?
But the master bedroom is not driven off the zone panel?
That one is stand alone?