Could be faulty circuit board - common problem with the Suprima. Sometimes taking it out (if you are a tech) and resoldering all the joints will fix it. There are companies on the net selling replacement PCBs at a fraction of the price of new
Ronnie, January 2010
no pilot, no thermocouple, it's automatic ignition. pcb's are notoriously faulty on earlier models of this boiler causing intermittent lockout.
