I tried to do everything I could to help my heating system when it began running inefficiently. I started noticing how often the heating system was running and how hard it was to heat my apartment evenly. Before calling an Heating and A/C professional, I tried replacing the air filter to see if that would help. The outdated air filter was covered in dust and debri, so I felt confident that the clean air filter I was replacing it with would do the trick. However, even though the clean air filter genuinely helped a little, I didn’t notice a significant change in the frequency my heating system was running. Next, I inspected the outside machine to see if there were any branches or tall grass covering it. I cleared a few sticks and trimmed the bushes back, but I still didn’t notice a difference in my heating system efficiency. I broke down and hired an Heating and A/C professional because I knew I’d done what I could to get my heating system running normally again. The Heating and A/C professional was kind and considerate and she was entirely impressed with me for replacing the air filter and clearing the outside unit, however unfortunately, the real issue was the fan limit switch. The switch was faulty and the control machine wiring was tangled. I was upset about the cost to repair the limit switch, but the Heating and A/C professional said it was particularly inluxurious. I’m glad I did what I could before calling an Heating and A/C professional, and I’m glad the situation wasn’t worse than it was.