I have a Craftsman 1 HP shallow well water pump and the pump keeps over heating and shutting off...it seems to get hotter when it has shut down...when the pump is running, plenty of water is coming out and does not slow down or look like it low...what could be causing this?
There are a few possibilities. Pump duty cycle, ie. how long it is designed to run at one time. Most electric motors have a code on them or say continuous or some other duty cycle range. Is your pump designed to run as long as you run it. Next is wiring, are you using the correct gauge wire for the load? A wire size too large will generally not hurt, but decrease the wire size and your wire will heat up along with the motor. Usually this can cause the breaker to pop or the motor to over heat and stop. Another wiring issue could be a short or bad connection on either end. Some 230 motor will run on one leg of voltage but less efficient. Check the connections at both ends and put a meter on them to check for shorted wires and voltage on the wires at the pump. The last thing I can think or is that you have a defective pump in some way. Perhaps a bad bearing or seal. I am not familiar with pump controls yet. I am getting one soon. I am guessing there is a start/run capacitor in it. If it starts the pump it shouldn't be the source of your problem. Assuming all equipment you have is designed to work together. Good Luck.
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Probably the pump has a water pressure protection switch. So it will not run dry and burn up. How is it that you are losing water pressure? On the delivery end or receiving. Restrictions on a pump always are placed output
the pump is controlled by the storage tanks pressure switch , if it continues to run well after the pressure tank has refilled with water , either the switches manual override has been activated (lever) or its defective or blocked off with mud
new pump --not big enough for the job
old pump --motor windings problem, faulty start run capacitor
I suspect that as the motor is 1/2 hp if will run good when there is a need for water but under pressure the pressure switch is set to high so the motor overloads and gets hot
It sounds to me like you have a defective thermal switch that is shutting power off as if motor is overheating.Unless you are exceding the head or flow ratings on the pump I would recommend you return it for replacement.Thank you.
If heating up, the motor thermal switch is opening to shut down the motor; this is by design. During the brief run time does it pump at all? It sounds as if there may be mechanical issues on the pump itself and the motor (from the extra draw) is heating up and shutting down. I'd look in to the pump to see if anything had failed within it.
I hope this may have helped,
Tom
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