[Peazoup]

Originally Posted by hvac877

It sounds like the condensate line the pump pumps into may be plugged causing the pump to continue running. You may want to consider having the unit cleaned and checked. Check drain lines, check drain pan, check outside where the line drains out may be plugged with grass or dirt causing the blockage. On some of these systems the pumps were located above the ceiling in the attic space making it difficult to service. You can call DeSantis HVAC service 352-330-4433.

Thanks so much. The unit has been serviced - twice since it started to hum.