aquatronica plug bar humming

[Prometheus]

guys i have just noticed my aquatronica plug bar humming like mad :eek: is this normal.

currently there is nothing plugged into it apart from the PH probe and the temp monitor.

anyone offer advise :rolleyes:

[mantis]

I think they changed the resistor inside which then made loads of them hum, I took mine back to the LFS until they gave me one which didnt hum. that took 3 different ones until I got a good one

craig

[Prometheus]

well it is under warrenty some hopefully itc will mail me on monday

[Stevielad]

One of mine hums. So its in the shed where i can't hear it! The other quieter one is in the house.