ferroli fault code A26 on optimax HE 38C

john smith, March 2010

I'm having the same problem. The system pressure will increase too over 2-3bar and shut off from a starting position of 1.2bar. If I start from a position of a half a bar then I can only set my temperature to around 50 degrees for the system to stay under 2bar and remain on????

Ron McDowell, December 2017

Thanks for advising of the A26 fault code. My water pressure was too high. However, when I lowered the pressure by draining water from the system, the fault code would not go away. There was one more act to play and this was to press the reset button on the panel. Glad to say the system became operational once again

Gary, January 2012

check your water pressure and see if its over 2-3.just means when the the water pressure on gauge has gone too high more than 3 times, but its not in the manual .just drop the pressure from a vent on a radiator or a drain off till the pressure is just above one bar

ferroli engineer, May 2010