Climate Control has mind of it's own

This topic has been raised before, but for the life of me I am unable to find any threads on the issue.

I have a problem with my climate control unit. The unit appears to be running correctly, and returns no error codes, however, the unit changes the set temperature all by itself.
For example, it the internal temperature was set to 23 degrees celcius, unless I was holding the down arrow on the temperature adjustment the set temp would start increasing all the way to maximum, as if I were pushing the up arrow on the temperature control.

Has anyone else come accross this problem? Surely you have. Anyone know of a way to fix the problem, as I'm getting fed up with the piece of paper jammed in the temperature setting lever/button.

P.S. I've also come to notice that the problem comes and goes depending on humidity and outside temperature.

HELP HELP HELP!!!

Stressed SVXer