Auxiliary Heating Not Working After Tow Bar

[Calisand]

Hi, I had a tow bar fitted last week by PF Jones - all good. However on our first trip away after I’ve discovered the auxiliary heating not working and showing an error. I’m guessing it’s probably because battery disconnected and error needs to be cleared and heating reset but I don’t know how - any advice appreciated.

**** - Update - following advice on an earlier thread - thanks WG - I’ve managed to do soft reset - all working now.