Logo
 
 

Pumps
 
Your pump problems
Last updated questions
News and Articles


   
WellPumps Troubleshooting Guide


 


Approaching a well pump repair situation requires knowledge of electricity. Adequate electrical testing equipment is essential for correctly diagnosing voltage, amperage and continuity of components or systems. Motors that are malfunctioning due to excessive resistance draw more amperage than its normal operating cycle. Typical amperage reading on a malfunctioning motor will be three to six times higher than its normal operating amperage reading.

Problem
Possible Cause
Repair Procedure
Possible Solution
Motor always runs Low well water level Pump is oversized for well capacity or yield Test yield of well and size accordingly
Motor always runs Well has collapsed Attempt to free pump or piping from collapsed soil Raise pump or piping if well is deep enough
Motor always runs Well has collapsed Attempt to free pump or piping from collapsed soil Have well cleaned and lined or new well
Circuit trips or fuse blows on start up Obstructed impeller from sand or debris Inspect impeller for obstruction Clean impeller and determine the cause
Circuit trips or fuse blows on start up Defective wiring Inspect wiring Repair or replace wiring
Circuit trips or fuse blows on start up Wiring is grounded to casing Perform Ohm test on well casing and wiring Repair or replace wiring in well
Circuit trips or fuse blows on start up Faulty pressure switch Check for voltage transfer between terminals Replace motor
Circuit trips or fuse blows on start up Motor winding is defective Perform Ohm test on winding Release or reinstall nipple
Circuit trips or fuse blows on start up Defective capacitor(three wire type pump) Locate in control box,perform Ohm test Replace if defective
Circuit trips or fuse blows on start up Defective relay coil(three wire type pump) Locate in control box, perform Ohm test Replace if required
Circuit trips or fuse blows on start up Control box is overheated Notice location of control box Locate in shaded or away from heat
Circuit trips or fuse blows on start up Voltage supply is incorrect Perform voltage test Call electrical service provider

 

   
Copy all rights reserved by well pumps