Yes. Failure to maintain the proper flush flow and pressure will, in time, result in failure of the HTP/HTX. Temporarily stopping the flush flow will not cause immediate harm.  Without proper flow over many months, it could begin to exhibit a declining signal vs. temperature due to corrosive reaction gas elements that migrate through the wall of the Alumina ceramic Inner Element Well and slowly attack the thermocouple wires. The DModel HFS Flush Gas Control Station eliminates this problem by providing a simple and proper installation that conveniently monitors the pressure and flow rate.