I have this carrier a/c and furnace unit and one day I was outside fiddling with some brushes when accidentally I disconnected the 2 signal wires. I tried to reconnect them but I may have reversed the polarity.
Now my ac doesn't receive the signal to turn on, hence, i have no a/c.
when i go outside and press down on the activation relay, the a/c works, that's how i know it's a signal issue.
Do I need to replace the computer boards?
This is my first a/c unit and my first home. Who should I contact to fix this and how will i know if I'm getting shafted or not?