Air conditioning not working in the summer

I called my landlord to explain that my thermostat was on, but the air wasn’t cooling enough and normally my air conditioner works perfectly

I just got home from a long day at work. When I entered my apartment it felt warmer than usual, but I wasn’t too concerned at first because I turned the thermostat up to 78 degrees before I left. I tried to turn the thermostat down to 73 degrees which is comfortable for me, but it didn’t seem to be cooling down. I tried not to panic, because that wouldn’t help me cool down. I walked near a vent and it felt like no cooling air was coming out. All I wanted was to feel cool air conditioning coming out of the vents on this hot summer night. I walked downstairs to the lobby where my landlord stores air filters for residents. I picked one up and googled how to change an air filter. Google explained that changing air filters was a simple process.I followed the directions which said to slide the old air filter out and slide the new air filter back in. When I looked at the old air filter, it was covered in dust and mold. I slid the new filter in and tried to turn the thermostat back on. I heard the air conditioning come on, but the apartment wasn’t cooling down enough. I decided to sleep with my fan on blast and hope for the best. It was a rough night of tossing and turning. I called my landlord to explain that my thermostat was on, but the air wasn’t cooling enough and normally my air conditioner works perfectly. He stated that he would have to call the HVAC company that services our building but he couldn’t guarantee when they would arrive. I went to work and when I came home I noticed that a wonderful HVAC technician fixed my air conditioner.

central heater