Arrived onsite to customers request of having a pump changed out, pump serves upstairs of church, Curtis had informed me that the rotor would spin than lock up, this means the pump is bad, provided pricing to Curtis to replace the pump with a new grundfos pump provided by us, Curtis accepted pricing. Isolated pump, drained pump, removed existing pump, installed new grundfos UPS26-99f pump, wired pump, tested operation of system. Confirmed air was bled and each base board heater was warm. Thank you for choosing CPI Plumbing and Heating Inc.