I have a sewage lift pump in the crawl space of my house. It backed up causing the alarm to sound. Went and check and floats and everything okay. Pump keeps running and shutting off due to thermal protector on pump. Do you have any suggestions?

You need to determine if there is a blockage down stream of the pump causing the overload to trip. If not, and the overload switch is not accessible for replacement, I hate to say it, but you would need a new pump.