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Pump for short period - Plumbing

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I assume you mean the pump will run for a short period and then turn off only later to start again? If this is the case the motor's thermal switch is opening due to too much internal heat. If the pump is miss sized "too lagre for the head (pressure)" the pump will operate off its curve drawing too many amps heating up the motor. If this is the case you can throttle back the pump (less flow more pressure) to keep it on its curve. If however this is an existing pump and now having this issue I'd guess that the thermal switch has weakend and will require replacement.
I hope this may have helped,

Posted on Sep 25, 2009


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