If your HVAC system is broken or not working correctly then I highly advise you contact HVAC contractors Wilmington NC. They will come and look at your HVAC system right away and make the necessary changes to ensure that it works correctly in the future. You can try and fix your heating and cooling system yourself but if you do not know what you are doing then you could actually do more damage than good.
There are many tools that you will need if you do decide to fix the problem yourself. This can get expensive if you do not already have the tools needed to fix whatever problem you may have with your HVAC system. This is another reason that I advise that you get HVAC contractors to look at it for you. They will already have the tools needed to perform the task at hand. They will also have the knowledge to help prevent from your HVAC system from breaking again.