Add Yahoo as a preferred source to see more of our stories on Google. Dirty air conditioner coils can quietly drive up your energy bill, weaken airflow, and even push your system toward an early ...

You might be in the habit of regularly wiping down your refrigerator’s shelves and exterior door and tossing out its expired contents, but when was the last time you thought about cleaning the coils?

One to two times a year, call up your local HVAC professional to take a look at your all-too-important AC coils. Cleaning AC coils costs anywhere from $75 to $700, or an average of $125 per coil. Dirt ...