Ensure the yellow or main gas isolation valve located on the pipework underneath the boiler is turned parallel to the pipe (Open position).
While official product specs for this specific model are not widely publicized, the "Eco Plus" branding in Fagor's lineup typically signified a commitment to energy and water efficiency, aligning with the brand's known focus on sustainability. Fagor Eco Plus Fa 15-20 Manual
Allow the unit to cool down completely for 20 minutes. Ensure the external vent is completely clear. Attempt a system reset. If the light persists, the safety limit switch may need replacement by a professional. Issue 3: Fluctuating Water Temperatures (Going Hot to Cold) Ensure the yellow or main gas isolation valve