Truma Combi (E) with iNet ready control panel problem

gerry55

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I have a Truma Combi (E) boiler connected to a Truma iNet ready Control Panel in my Motorhome, there is No iNet Box fitted so the Truma App has no role to play in this.
If I take a trip in my Motorhome and leave the clock showing on the control panel, when I arrive at my destination, the fan on the boiler will be blowing air. If I turn off the control panel before I start my journey, the fan will start to blow air as soon as the control panel is turned on. The solution, in both cases, it to turn off the battery isolation switch and turn it on again and then start up the control panel. In both cases the fault W255H will show on the control panel and the manual lists this as the heater not having a 12V power supply or no connection between heater and control panel.
The fan also starts to blow as soon as the mains cable is connected as well, the solution here is to unplug, turn off the battery isolation switch and plug back in and turn on the battery and the control panel.
I never travel with the boiler running or set to run, all of the available options are set to OFF.
Any advice or suggestions would be greatly appreciated.
 
We had the same problem on ours it’s the truma 4e heater on ours,
SMC replaced the pcb on the heater and not a problem since and that was two years ago
 
I have a new pcb here in box let me know if you wish to pursue to see if it is compatible which I think it is
 
Thank you for your kind offer, I'll keep it in mind while I see if I can extract the existing one from the machine and have a good look at what I'm dealing with.
 
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