Do I need to drill a hole in the back of the cabinet to change out the cap tube?
Officially, Down for the count
YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET
It was working when I left...
Liberalism-Ideas so good they mandate them
That is the easiest way to do it. Try not to drill through the suction line, though, like I did. Then you have to run a new cap tube and suction line.
When you get a chance, call True and ask if they will send you their service manual. It covers cap tubes and alot of other info.