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Troubleshooting Pumps
Problem 1 - If the pump is making a high pitched squealing sound, then the (motor) needs to be brought to a repair shop to have the bearings replaced.
Problem 2 - If the motor is overheating, e.g. pump shutting on and off, check the impeller to see if anything is stuck in it, like pine needles or leaves. Clean out the impeller and restart the pump. If nothing is clogging the impeller then bring the motor to a repair shop. Chances are the windings are dirty and need to be cleaned or there is an electrical problem with the contacts.
Problem 3 - If the pump is not priming, either the lid is not on tight enough or the O-ring might not be placed properly, causing the pump to suck air. Take any debris out from under the lid, and remove the O-ring. Put the O-ring up to the light, and if there are any cracks in it, the O-ring needs to be replaced. If the O-ring is intact, put it back in place and tighten.
Seized Pump - Use penetrating motor oil on shaft ends, and a light tap on the rear end of shaft (under cap). On some pumps the front part of shaft (near impeller housing) may be exposed and accessible to channel lock pliers. Use pliers to turn shaft. In many cases, the pump will slightly squeal when first turned on; but will soon quieten down. If it does not then further service is required.
NOTE: On exceptionally hot days because of thermal overload, the pump will shut down. Wait out the hot spell (one or two days) and if the pump is not working bring it in.
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