When our air is running we have a foul smell but it doesn't do it when the heat is running why?
What can it be? Sometimes its real bad and makes you sick.Any ideas of what it can be?
If you haven't had your A/C tuned up or had a PM done there could be a film or what we call skode (really nasty looking stuff) in you primary drain pan. Also your Evap or A coil may need a cleaning, after a while they can start to give off an odor and it's especially noticeable with a Heat Pump. Get an HVAC Co. to do a PM and have it checked out. It's a good idea to have this done every spring for A/C and winter for Heat, it could save you money and make your Equipment last longer