Suprima 50 problem (not the pcb)

[jelboy]

HI all
I have a problem with a Suprima 50. It has a 1999 board on it (the original) but it does go through the motions and does fire up. Unfortunatley it only stays on for a matter of seconds then cuts out... doesnt go to lock out just refires again then repeats, then goes to a flashing red... any ideas pls?
Pump is fine, no air in system, 2 ports both calling for heat
Thanks
Jelboy

 

[gas_man_gaz]

why int it the pcb?

 

[matt1e]

doesnt go to lock out just refires again then repeats, then goes to a flashing red... any ideas pls?

it is going into blocking mode (the flashing red light)at a guess it thinks it hasn't lit,
ps how do you know its not the PCB?,get a RGI in
Matt