I wanted to have a BBQ for all of our friends. We had ribs, steaks, burgers and hot dogs on the grill. I got out my special seasonings and did up a batch of chicken wings. The smells coming from the food was tantalizing. Everyone was enjoying the food and some drinks. In the middle of the merriment, the HVAC system began to have some problems. I was really upset, thinking that I was going to need to call the HVAC company. My friends stopped me when they saw me making the call. They were sure that between the group of us, we should be able to service the HVAC. None of us could figure out how hard any of this could be. We decided to go online and check out some DIY videos. We got a lot of information about HVAC. We got to see a lot of videos where HVAC specialists were actually doing the work. One HVAC tech was going over the common causes for problems with an HVAC system. He talked about what most homeowners were commonly overlooking. One of the first things she mentioned was how many homeowners forget about the air filters. A dirty air filter is one of the most common causes of HVAC problems. I couldn’t remember when I had last changed the air filter on my furnace or air conditioning units. According to this video, clogged air filters can destroy your air quality along with destroying the equipment. We all decided to check the air filters, and we were glad we did. As soon as the air filter was changed, the air conditioning began to work well again.