Hello. I now have the next problem with my Omega. In the last days my cooling temperature did not even go up to 90 degrees and had not had the full heating heat. I then renewed the thermostat. During the test drive I noticed that the temperature indicator rises from 80 to almost 100 degrees and back again. Over and over again. And I can put the heating on completely hot, but it comes only cold air or very minimally warm air. and if I unscrew the lid from the balance tank, you can hear that there’s pressure on it. I’ve already tried the search function but somehow didn’t find what could solve my problem. Could someone help me what it might be about ?