I have a Hayward SP1510Z1XEHC 1HP Pump that's been working fine until today. I went out to check my chlorine after work and noticed the pump wasn't running. I turned it off, and when I tried to start it back up, it just hummed. Are there any suggestions on trying to fix it? I'm hoping it's not dead as I just spent all of last week SLAMing and getting my chemicals balanced.