I've getting getting problems with a 4 year old Suprima going to lockout. The red light flashes quickly and the circulating pump continues to run but it won't fire up until the reset button is pushed.
My local boiler engineer has suggested that it's probably the pcb, but he's not absolutely sure. He wants 250 pounds to supply and install a new one.
If there are any heating experts out there I'd appreciate their confirmation that this is the most likely cause. I've had a look and it seems a simple job to replace it myself and I've found a reconditioned unit from Control Engineering for 50 pounds or so.
Thanks in advance.
Roly