Sump Pump Diaphragm Switch
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How to Troubleshoot a Sump Pump Diaphragm Switch Instructions A.Pump Not Running or Cycling Too Slowly 1 Make sure that the piggyback plug is fully inserted at the switch outlet and the power source. 2 Check the circuit breaker or fuse panel for the sump pump to make sure there is power going to the circuit. Reset the breaker or replace the fuse if it has tripped or blown. 3 Unplug the sump pump and test the outlet with a voltmeter or by plugging another appliance, such as a lamp, into the outlet. If there is no power, contact an electrician to inspect and repair the outlet wiring. 4 Remove the cover to the sump pump pit and plug the inlets to the pit with a large towel or a test plug. 5 Fill the pit with a garden hose or bucket and wait for the pump to cycle on. When the water rises in the sump pit, it increases the pressure on the switch. Once the pressure is high enough, it compresses a bladder within the switch that turns the pump on. As water is pumped out, the pressure decreases, and the pump shuts off. If there is not enough water in the pit to apply pressure, the pump may not cycle on. 6 Remove the screen from the bottom of the pump to check the impeller. If this is blocked by debris, it may not move freely, and this can affect cycling. 7 Remove the towel from the pit inlets and replace the cover if the impeller is not blocked, the sump pit is full and the pump is still not cycling. 8 Unplug the pump cord from the piggyback plug on the float switch and plug the pump directly into the outlet. Use an extension cord if the pump cord will not reach the outlet. If the pump runs when plugged in directly, the switch is defective. 9 Disconnect the pump plug and replace the diaphragm switch. Switches that are wired in cannot be replaced. In this case the pump should be returned to the manufacturer for repair. B.Pump Runs Constantly or Cycles On and Off Too Frequently |
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