F05 Fault - Ferroli DOMIcondens HE 26c

[alfy87]

Pulling my hair out with this one.

Initially the boiler was only throwing up the fault intermitantly when the hot water was turned on. We were sure we were disturbing something when investigating the boiler, but now it comes on every time the hot tap is run.

All sensors and wiring have been checked...could that only mean the PCB has had it?

Also worth noting...maybe coincidence, but when the hot water does work from the tap it always seems to fail again when the shower is ran...

Boiler is less that 2 years old but not covered by warranty as it wasn't serviced in the first year.

 

[alanwarr47]

faulty fume pressure causes lock out and f05 to flash on.its rarely the pcb that is the culprit. boilermust be set to operate at its maximum heat setting ,85c.
It is no use asking ferroli for help. they are useless. don't know how they stay in business!!!! [/b]