Our building is equipped with this airconditioning system for some years. Lately, It's inconsistent airflow had some problems in the building, sometimes it's powerful, sometimes it's slow. The whole building was having a different temperature. This causes a lot of difficulties I started to get many complains from the clients. So I contacted the nearby HVAC repair service for checking the issue. After fixing the problem they told me it was a problem with a faulty board. Which caused the different temperature control in the building. They told it can be because of the leak in HVAC unit or some faulty system board. What do you people think about it? Do these situations do happen often?