Century 2 speed pump drops to low speed, runs 3 to4 minutes then just shuts off

[gus777]

My 2 speed pool pump runs great on high but when it drops to low speed it only runs for about 3 to 4 minutes then the pump shuts off. I thought it was a bad run capacitor so I changed it out with a new one and it operated the same way. When the motor shuts off there is no hum and the pool motor is cool to the touch. It will run on high speed for hours without a problem.
Please note my motor is controlled by a Goldline Aqua Logic panel.

 

[Texas Splash]

Welcome to TFP! Is the motor dropping to low speed on its own via Aqua Logic programming? If so, it would be reasonable to think the Aqua Logic might have a part in this issue. If not, if you manually switch the motor to low and it shuts off, I would wonder if there's a restriction or "drag" in the motor itself in the form of bearings or a bent shaft. Hold old is the motor?

Let's see if others have more thoughts or experience with the Goldline panel features and troubleshooting.

 

[Getting Smart Guy]

The licensed electrician I paid to wire up my new 2 speed pump did not understand two speed pumps. He made some assumptions about wiring that appeared to be based on wire color rather than figuring out the somewhat confusing instructions from the pump manufacturer and the same exact thing happened after about 9 months.
Try to figure it out yourself if you can and get an "experienced" and qualified licensed electrician to do it. An electric motor repair shop or a pump repair show probably recommend a good guy.
I ended up doing it my self and learned something from that experience. Decades ago I built up a few Heathkit projects and it wasn't too hard to complete it. I also have a few decades in construction as a GC too.
No, I'll only recommend that electrician to people with simple projects, or maybe to people I don't like very much.

 

[1poolman1]

My 2 speed pool pump runs great on high but when it drops to low speed it only runs for about 3 to 4 minutes then the pump shuts off. I thought it was a bad run capacitor so I changed it out with a new one and it operated the same way. When the motor shuts off there is no hum and the pool motor is cool to the touch. It will run on high speed for hours without a problem.
Please note my motor is controlled by a Goldline Aqua Logic panel.

Does it turn back on? Does the Aqua Logic indicate it is supposed to be on?
If not, first thing to check is the programming of the control. If the pump turns to low speed without issue the system may be turning it off.