I unplugged my ATO today to refill my container. After plugging it in, it does this. It does this both with the pump hooked up, and without it hooked up.
Any advice appreciated.
Any advice appreciated.
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Unless it is only due to some freshwater condensing inside, for example it suddenly got cold in a humid room, it will need repair that will generally involve cleaning the board and touching up corroded connections. If it is only condensation, it will start to work once it dries. You could open the controller and carefully examine the board for any white or green staining. The most common cause is just that the power supply tip was unplugged from the controller, landed in a puddle or sump and then got plugged in wet and then the corrosion is under the power supply socket which we need to unsolder and clean under neath. The other possibility is water followed a cable down to the controller from a sensor or the pump connections, this is uncommon unless the controller was not mounted and there was no drip loop in the cables.