Brewbuilt Icemax 4 problem

[30_Ounce]

My 2 year old Icemax 4 is cycling all 4 temp controllers on and off every second or 2. The main glycol temp controller is not cycling. Any ideas of what is going on? The temp controllers seem to be clicking like a relay is tripping.

 

[30_Ounce]

Turns out one of my pumps may have died. Disconnecting that pump stopped the cycling and allowed me to switch that fermenter to another temp controller/pump and all is working. Anyone have any ideas on what kind of pump these use?