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Symptom Possible Cause(s) Corrective Action
Pump will not start or run 1. Blown fuse, tripped breaker
2. Low line voltage
3. Defective motor
4. Defective float switch
5. Stuck/ jammed impeller
6. Float obstructed
1. If blown, replace with proper sized fuse or reset breaker
2. If voltage is under 108 volts, check wiring size
3. Replace pump
4. Replace float switch
5. If impeller will not turn, remove housing and remove
blockage
6. Make sure float(s) move freely up and down
Pump starts and stops too
often
1. Back-flow of water from
piping
2. Faulty float switch
1. Install or replace check valve
2. Replace float switch
Pump will not shut off or
thermal protector turns off
1. Defective float switch
2. Obstacle in piping
3. Float obstructed
4. Low line voltage
5. Too many appliances on
circuit
1. Replace float switch
2. Remove pump and clean pump and piping
3. Make sure float move freely up and down
4. If voltage is under 108 volts, check wiring size
5. Install pump on dedicated circuit. IMPORTANT: Do not
use extension cord to power pump.
Pump operates but delivers
little or no water
1. Plugged impeller
2. Check valve installed
backwards
3. Pump air locked
1. Clean out impeller
2. Reverse position of check valve
3. Check the 1/8 in. hole in discharge line between
pump and check valve; it should be 1 in. to 2 in. above
discharge flange and before the check valve
Troubleshooting Chart
Operating Instructions and Parts Manual