Machine displays ALARM 15; auto-fill timeout or boiler did not reach level within expected time.

Safety first: Turn OFF and unplug the machine. Close the water supply and relieve pressure before removing any water fittings.

Steps to address ALARM 15:

• Confirm water supply and pressure: Ensure the main water line is open and that pressure is within spec. Replace or bypass any clogged external filters.
• Check pump performance: Listen for the pump during fill. If it sounds strained or unusually quiet, test line pressure and pump output. Replace the pump if it cannot build pressure.
• Inspect fill solenoid: Remove and clean the boiler fill solenoid valve. Check for debris or scale in the inlet screen and orifice.
• Bleed air from boiler: After reassembly, open the hot water tap and allow water to flow until a steady stream appears, helping to remove airlocks.
• Clean level probe: If the boiler is filling but the machine does not detect level, descale the level probe as described in other level probe procedures.
• Re-test: Restore water and power, then monitor the next fill cycle. If ALARM 15 persists, the control board timing or level circuit may require professional diagnosis.