: For technicians, holding the Reset button for roughly 10 seconds activates "Test" mode for combustion checks. Common Fault Codes Common Cause 108 Low Water Pressure The system has leaked or needs topping up. 5P1 / SP1 First Ignition Failed Blocked burner, faulty leads, or gas supply issues. 5P2 / SP2 Second Ignition Failed Sustained failure to ignite, leading to lockout. Safety & Expert Resources
: If the pressure is low, open the filling loop valves (usually blue or black handles under the boiler) until the needle reaches the correct range, then close them tightly. ariston clas evo instruktsiia
: If the boiler displays a lockout error, turn the main dial to the Reset position for a few seconds, then back to the desired mode. : For technicians, holding the Reset button for