Problem with heater tripping

[mordie]

I have a Peugeot boxer auto sleeper (2019). The heater keeps tripping out , I have reset it but it keeps tripping after a short period. Can anyone suggest what the problem is please.

 

[Bailey 15]

What heater is it?
Our truma6 kept doing this last winter and it was because gas bottle was getting low
What fault code code is it showing ?

 

[mordie]

It’s a Truma 6 combi. The error code is E504H. It is happening on EHU.

 

[Bailey 15]

Reboot everything, check little red button on Truma is green, try again
In the search bar put in Truma code E504 H faults and you should see a discussion on this in Jan 2022

 

[mordie]

Thanks for the help, will try