If you’re finding your air conditioning window unit or central system appears to not be working as efficiently as it once was, check one thing before calling the repairman. Air conditioning systems have air filters that need to be cleaned or replaced regularly. A dirty air filter can force a system to work harder, which means it uses more energy and can also prevent your home from cooling down. Turn off the system or air conditioner and remove the filter; if it’s dirty, replace it. Then turn on the system to see if it makes a difference.
ANDREWS MCMEEL SYNDICATION