'I have verified that the coolant is flowing through the power supply, power head, and the coil.'
If the flow or pressure drops below the minimum requirements, you will get the low flow alarms. If the flow and pressure requirements are being met, it’s possible the flow switch has gone bad. We always recommend breaking the water lines and install pressure gauges and flow meters to be sure the minimum parameters are being met. If it is flow or pressure causing the issue, a new flow switch will not resolve the issue.