No heat. 2015. Pressure sensor error.

[Philipnjf]

Hi all.
Long story, bought my egolf knowing that heating was not working. It was a small no brand dealer, they had changed the 3 pressure sensors that was making errors. But they had not given them linbus adresses.
I took the car to a guy I known that has an original vcds, and knowns how to use it.
He could give 2 sensors an adress, but not sensor no 5.
Now has anyone heard of this before?
I can see that the hvac has the old 0107 software. And could/should be updated to 0203.
Could this maybe solve the problem?
Any other suggestions?
Best Regards. Philip

 

[Philipnjf]

So tried to read the codes with vcds. Maybe it makes to somebody here? The pressure sensors has been changed. But I can not use the command to give adresses to slave components. Everything looks like a bus problem. I will have the software of the heatpump updated on thursday. But other than that I am clueless.
I do not know if I have a bus problem that causes problems with the sensors. Or I am having a sensor problem that causes errors with the bus?
I have not seen anybody else with bus problems for the heat pump?