[jclark003]

Does the pump run with no water flow? If so above advice is correct. If the pump does not run then it is either a problem with the pump motor or the switching on the supply side. First check is to put a meter on the wires going into the pump. 120VAC so be careful. If no power and two ac units share the same pump then try setting the second ac unit into cooling mode. If the pump starts moving water then most likely you have a bad trigger. Triggers are located in a small control box with wires leading to each condensing unit, the pump motor and the breaker panel. Not unusual for them to fail and can be purchased at most marine ac shops or on ebay for less than $50.00. Make sure you turn off all breakers to ac units and pump supply before opening up and servicing the box.