If you can see through the filter, the problem with your AC not cooling lies elsewhere. Air conditioners work in part by removing humidity from the air (through condensation), and that moisture ...

Not cool enough for you? It might result from a clogged air-conditioning condenser or disabled cooling fan. A leak in the condenser will also result in a loss of refrigerant.

If your heater is blowing but isn't sending out warm air, you need to follow these steps to get it fixed. Here's how to keep your furnace working.