Heater showing fault e613h can anyone please tell what the problem is

[Joe murphy]

Heater not working on my 600. Showing fault e613h I would appreciate it if someone could tell me what this is and how do I fix it. Thanks.

 

[WelshGas]

Heater not working on my 600. Showing fault e613h I would appreciate it if someone could tell me what this is and how do I fix it. Thanks.

https://www.caravantalk.co.uk/community/topic/157009-truma-e631h-error-code/