Display shows E15 and the machine will not allow the heater to turn on due to low solution flow.

Safety: Turn off and unplug the machine. Depressurize the solution system before disconnecting hoses.

• Clean inlet filter: Remove the solution tank and locate the inlet strainer or filter. Rinse thoroughly to remove lint and debris. Reinstall securely.
• Check solution hoses: Inspect hoses from tank to pump and pump to heater for kinks, sharp bends, or internal collapse. Replace any damaged hoses.
• Bleed air from pump: Fill the solution tank, start the pump, and hold the wand trigger open until a steady flow is achieved. Some models have a dedicated prime valve—open it until air is purged.
• Test flow switch: Locate the flow switch on the solution line (often a small in-line device with two wires). Bypass it temporarily by joining the wires with an insulated jumper. If the heater now operates, replace the Prochem flow switch.