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TROUBLESHOOTING GUIDE SUGGESTION PROBLEM POSSIBLE SOURCE 1 The pump doesn’t start 1.1 Power failure. 1.1a Check the electrical power circuit and supply 1.2 Seized impeller. 1.2a Disassemble the pump body and check. 2 The pump runs but does 2.1 The impeller is damaged. 2.1a Disassemble the pump and check the impeller.