Saunier Duval SB30e
I have had this problem for over a year with a competent CH man visiting 6 times and not being able to sort the problem.
Just to explain that when the system calls for heat or HW the boiler starts up then after a few seconds goes to lock-out. Previously with the pump on the fastest speed if I pressed the reset button the boiler would fire up and run, no problem.
What I did today is select the slowest speed on the pump. The boiler starts up as before and goes to lock-out. If I press the reset button it will run for a few seconds and go to lock-out every time.
Items replaced so far - PCB, Gas Valve, igniters, thermister, boiler cut out.
Anybody got any ideas
Regards
I have had this problem for over a year with a competent CH man visiting 6 times and not being able to sort the problem.
Just to explain that when the system calls for heat or HW the boiler starts up then after a few seconds goes to lock-out. Previously with the pump on the fastest speed if I pressed the reset button the boiler would fire up and run, no problem.
What I did today is select the slowest speed on the pump. The boiler starts up as before and goes to lock-out. If I press the reset button it will run for a few seconds and go to lock-out every time.
Items replaced so far - PCB, Gas Valve, igniters, thermister, boiler cut out.
Anybody got any ideas
Regards