ap10046

Hi all.
After reading the retrofitting of a Climatronic panel on an A-Class, on 2 other forums, I attempted to do the same.
https://www.aclassclub.co.uk/threads...ol-unit.10277/
https://www.mercedescla.org/threads/...etrofit.14731/
It does turn on, switches the compressor on and off, recirculate works, regulates the fan speed, alters air flow (albeit a bit weirdly).
However, the air is warm/very warm only. There is no cold air coming through the vents.
Given, I have not connected the interior temperature probe (as the car did not have one), only the solar/sun sensor.
Has anyone attempted this?
Any help would be massively appreciated.