I installed this pump and aeration system last fall. It has been running continuously with no problems. I turned it off yesterday to checck the filter, etc.. It would not start back up . It justs "hums" and then shuts off. I checked all the filters, it is very clean sitting in a housing. I changed out the extension cord. Any troubleshooting tips? It is under warranty but if its something simple I'd like to try it.
Thanks
