Auxiliary heater locked - Caravelle T6

[matteous1]

I guys, I got yesterday the Carista OBD, when I tried it I got some errors, don't want to talk about all of them now to avoid confusion, those I'm trying to sort out now are about the Auxiliary Heating:

0002 - No Flame Detected After Repeated Start Attempts
0056 - No Flame Detected During Initial Start Attempts
0135 - Heater Unit Locked

I was reading this post but I couldn't find any info about unlocking it with the Carista:

Webasto Aux Heater Unlock

Good evening all, Trying to unlock my Webasto Auxillary Heater via VCDS but struggling. I've tried clearing the failed start codes but unsuccessful. I have gone into adaptions and I believe I need to change a 0 to a 1 in a specific channel. But I have drop down options instead of channels...

www.t6forum.com

I've read here that is possible to unlock it:

Carista Blog: The Ultimate Resource for Car Enthusiasts

Your go-to hub for car diagnostics, settings, live data, and service tools. Learn how to diagnose, customize and service your car like a PRO.

blog.caristaapp.com

But I've also read that there are different level of "unlock".

So these are my doubts:

- Why has this happened? I would have never know that without the Carista until the service probably.
- Should I perform the unlock with the Carista? If yes, once done, isn't there any way to test it other than waiting less than 5 degrees outside?
- Should it be sorted out by just unlocking it with the Carista or is there anything else I should do?

Thanks