Hi all, after 4 years of ownership and not able to get my fbh to operate I decided to replace unit with a good used unit. Still has the same issue
I am able to prime and force the unit to run with my IID tool. It then runs for 20 seconds then stops. During the firing I can’t hear the pump ticking but I can hear it while priming with iid.

I tried to connect with Webasto software through pin 2 on 6 pin plug but having trouble connecting.

Anyone any ideas?
Thanks
2010 3.6.