My pump has been running fine for 2 years. Today it began overheating then shutting off after about 15 minutes. What could cause this?
There could be a couple of causes. If you recently replaced the impeller and the impeller was oversized, the motor would overheat and shut down. The more common cause is failed motor windings. In that case, the motor would need to be replaced.
You could replace your motor with model UST1152.