Pump stops and displays E08; may coincide with very high system pressure on the filter gauge.

Safety First: Turn OFF the pump before adjusting valves or opening any filter or heater equipment.

• Check return valves: Ensure all return and bypass valves are fully open. Slowly open any partially closed valves while monitoring filter pressure.
• Clean or backwash filter: If the filter pressure is 8–10 psi above clean pressure, backwash (sand/DE) or clean cartridges thoroughly. Replace worn cartridges if they do not clean up.
• Inspect downstream equipment: If a Rheem pool heater or heat pump is installed, check for blocked internal bypass or scale buildup. Follow the heater manual for flushing or descaling procedures.
• Verify plumbing size: Confirm that return lines are not reduced to very small diameters or kinked. Correct any obvious restrictions.
• Reset pump: After restoring normal flow, clear the E08 by cycling power and restart. If the error recurs with normal pressures, the pressure sensor or control may be faulty.