In Glendale, near West Kings Avenue and North 61st Drive performing Fall preventative maintenance on a Goettl package heat pump. Control board is getting stuck in defrost. Board is bad and system is no longer manufactured; cannot get a new control board for a Goettl system. Recommend replacing 5 ton package system. Checked water heater; water heater elements are good but water sample is very dirty; recommend doing a water heater flush or replacing.