Need to replace Grundfos UPS26-99FC Pump. Returned today to replace Load side pump. Shut off power to system. Shut off water flow to pumps. Removed wiring then removed old pump from flange. Installed new pump onto flange and connected wiring. Opened up water flow to verify no leaks. Purged any air out of line and burped air out of pump. Wrapped insulation around replaced pump and one above it to reduce condensation. Returned power to system and ran heat. Master and hunting zone already calling so I let system run naturally. Geo Load temp started at 95 degrees so I tested unit until setpoint at 125 degrees and all zones satisfied. Unit is operating normal at this time.