Customer called for service for radiant heat loop issue and pump problem. Checked radiant floor mix manifolds, valves, radiant zones. All zones except number 9 were up to setpoint. Tested pump 17 and working. Replaced multiple pumps due to sticking. Bad motor discovered on pump 7. Replaced. Purged and tested each loop. All working now. All problem zones except #9 were for forced air heat. Left thermostats the same as radiant setpoint for that zone. Recommend forced air zones be set at same temp as radiant zones to give pumps some use and keep temps more steady. Found unmarked switch at top of main control board that turns off all three attic hydronic heat pumps. Fixed. Problem totally resolved. Customer very happy and will refer to friends.