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my name is Billy.
Does the indoor or outdoor unit run?
Are you comfortable doing some test if needed?
Is the indoor blower in attic?
can you check the drain off the attic unit or look for water in drain pan?
The number one failure of attic units is a plugged drain...which then trips a safety switch to turn off ac so no water damage.
Lets try one thing first though...take thermostat top section off...locate red wire on R terminal and green on G...use a paperclip or wire shaped in a U and hold one end on R while other end on G...tell me if indoor blower starts
any way we can create a connection between the 2
thank you....do you know if the drain terminates outside somewhere from the indoor ac?
well we are at that point...I know you rather not check the attic unit...but that is the point we are at. If you can at a minimum trace the drain pipe from the attic unit..or just take pics and post here and I can mark the pics with directions