I was just at a friends helping him reconnect a 110VAC Hayward Pump back to his control switch. Everything looks fine and apparently the pump is about 5 yrs old. As stated, its wired as 110VAC.
The strange thing is when the pump is primed, it starts normally and pushes the water through the system. After about 20 seconds, when the pump is building a good pressure prime, the pump oddly starts cycling on and off as if someone is throwing a switch on and off. About every second.
When the pump is opened and some of the pressure is released, and the pump is then restarted, it starts off fine again. As soon as the pressure comes us, this wierd behavious begins again.
I've had hayward pumps for the past 20 years and never seen anything like this before (although my pumps are kept well and I've only ever had two).
Does anyone have any suggestions I can offer my friend before he hands over $500 for a new pump.
Thanks to all in advance,