Flow Pump

Flow Pump
Will a bad flow switch on a salt generator for a pool cause the pump to keep shutting off?

Display shows no flow or check flow switch. Back washed DE filter and cleaned. Started working periodically and now light is back on with warning display. Pool pump shuts off. I thought that the switch was to shut off the salt generator if there was no flow, not the pump. Flow seems to be ok and pressure gauge reading normal flow. Trying to determine if I need to just replace flow switch or have something else going on.

You were correct, in that, the flow switch is designed to shut off the chlorine production in the absence of adequate water flow to avoid a buildup of chlorine gas in the cell. However, if there is a problem that's causing the pump to shut off it would then set off the warning light on the system, but not the other way around. I would first confirm that your pump is operating properly, then make sure you have done the required yearly D&S(disassemble and service) on the filter. Pressure gauges frequently stick and give a false reading of the pressure. The grids on a DE filter need to be cleaned out every year or it could reduce the flow in the system enough to cause a 'No Flow'. Then check to make sure all valves are set properly to direct the flow of water through the cell/switch(sometimes water can bypass the switch if plumbed that way.) If all else is ruled out, remove the flow switch and inspect it for calcium build up or debris clogs that may have passed through the filter.

Hope you find this helpful. Good luck.

Pool Guy of 3 years with a company who only works with salt systems

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