Heater frequently shuts down with no code when the pump speed is reduced on a variable-speed pump.

Safety first: Turn off power before adjusting internal components. Pump programming can usually be changed from the pump controller.

• Increase minimum speed: Raise the minimum RPM of the variable-speed pump when the Kripsol heater is scheduled to run.
• Clean filter: Ensure the filter is clean so that adequate flow is maintained even at lower speeds.
• Observe flow switch: Verify that the Kripsol flow switch closes reliably at the chosen pump speed. If not, adjust speed or consult Kripsol for compatible flow requirements.
• Schedule coordination: Program the pump to run at higher speed during heating periods and lower speed at other times.