No cool on the geo system. Found the geo was tripped on a water flow error. I reset the unit. The geo turned on. I checked the pumps, they were running. Checked the pressure drop and temperature rise across the heat exchanger. Had 13 psi drop and a eight degree temp rise. This is ok. Checked a temperature split of the ductwork. It’s at 25 which is good. I tested the freeze protection thermistor and found it’s not reading correctly and caused the unit to not run. We will order a new thermistor. The unit is cooling at this time Also found the zone board isn’t allowing the geo to operate in 2nd stage. I jumpered out the board so it will run in second stage. We will quote a price to replace the zone board as well. Office will call with price for the zone board and the thermistor. .