air conditioner smell

It sounds like you need a new filter. The constant warming and cooling on these machines can build up moisture quickly. If it doesn't evaporate properly, the stagnant water can lead to fungi, molds, and mildews, as well as diseases like Legionnaire's disease growing in your unit. From now on keep the unit clean from any build up and you shouldn't encounter this problem again.

Go to AP Wagner Appliance Parts for a new filter.

jronimo said:

It sounds like you need a new filter. The constant warming and cooling on these machines can build up moisture quickly. If it doesn't evaporate properly, the stagnant water can lead to fungi, molds, and mildews, as well as diseases like Legionnaire's disease growing in your unit. From now on keep the unit clean from any build up and you shouldn't encounter this problem again.

Go to AP Wagner Appliance Parts for a new filter.

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Might not be a bad idea to clean the evaporator to. A through cleaning of both coils and the drip pan will eliminate. A commercial like Calgon Coil Cleaner
would be my choice.

Can what you describe here - the condensation mildewing - happen to our whole house air conditioner/ducts? We have an unexplained earthy smell this summer. The condensation pump is working, I checked it yesterday. We also have a trusteam humidifier. That unit is dry (as it should be in summer). It smells like it might be pulling air from the crawl space. We put a down vapor barrier and insulated the crawl space walls and ductwork.

If possible, remove the unit from its case, do a really thorough job.

Spray the hard to reach areas, like between coils with Lysol. Use a liquid version of same for areas you can get to, since wiping directly will do a better job than just spraying.
Be careful not to spray inside the relay box or other electrical components, although I don't think Lysol will harm anything.
Allow to dry out before restarting, so you don't get the smell of Lysol everywhere.

Replace the filter.

One note: Even though your drain plug is clear, you can still get water standing in the bottom of the unit if it is not properly mounted. You need a slight downward slope towards the outside.

FW

on window units that smell usually goes away after it runs a few days. unless you now have a mold problem. the coils drip water and flush the odors away. all the suggestions above were good. if you hose anything make sure ALL electrical parts are protected. next year just make sure a/c is completely dried out before storage and when reinstalling spray evap coils with an odor-ridder like Fabreze.

if you spray the coils won't the dirt and crap stick to them ?

no. they'll wash off. i'm assuming you won't use some oil based cleaner.

Jacques said:

no. they'll wash off. i'm assuming you won't use some oil based cleaner.

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OK so fabreez then hose it out :thumbsup:

We are still getting odor. I am not convinced it's mold but worry it might be. It could be either pulling air form the crawl space or the air handler is not draining and mold is forming (can't think of any other cause). Had a guy from the installation company who said he couldn't smell the odor. He also looked at the system and found nothing wrong. We are going ahead and running it with the windows open for a while to see if it clears. Welcome any suggestions.