resource any shrubs or weeds growing within the condenser unit. The unit should blow out the heated air, and If your outlet vents are blocked, this may lead to reduced efficiency of your system.A: First, it’s excellent you had an annual checkup done on your system; that’s among the best strategies to extend the life of your HVAC system. And also you’re right—HVAC substitution is usually highly-priced, so it’s a good idea to plan and save just index before the necessity to switch AC units or furnaces is quick.Your heating and cooling system has numerous settings. The most common ones would be the ‘automobile’ and ‘on’ positions.