If you have not gotten a heating and air conditioning service plan of some sort from your local heating and air conditioning company I believe you should think twice about this and go in and get one.
Because most heating and air conditioning service plans available from your local heating and cooling company come with a heat and a/c protection plan.
And if you have a heating and air conditioning protection plan you can protect your central heating and air conditioning system from natural disasters in terms of having to buy a new HVAC unit if something were to happen. Rather than having to reinvest thousands of dollars at the drop of a hat with no warning, a heating and cooling protection plan which usually comes with the heating and air conditioning service plans will replace your central heating and air conditioning system in the event of destruction from a storm or something along those lines. Some will even offer the brand new heating and cooling system installation at no additional cost as well, and some will just make you pay for the installation but not the central heating and air conditioning system. Which that is ok too because you can get good heating and air conditioning installation for under a thousand dollars most of the time. Which is still saving you a whole ton of cash. This is why i have a heating and air conditioning service as well as protection plan with my local heating and cooling company!