Product Operation FAQs

Please select from the following FAQ categories:

• What will it cost to operate my unit?

• I hear water in my unit. Is that normal?

• How often should I replace the carbon filter in my C-90B air cleaner?

• How do I install a carbon filter on my C-90B air cleaner?

• How does my drain valve work?

• Can I use my C-90B air cleaner with my window open?

• Why does more air come out of one side of the louvers?

• Why is my unit "louder" than an identical model in a friend’s house?

• Why doesn’t my A/C turn on when it is cold outside?

• My unit is making a humming noise. Could it be the compressor?

• Do you recommend covering the Air Conditioner during the off season?

• Why can’t an extension cord be used on my Friedrich Air Conditioner?

• Does the C-90B electronic air cleaner produce any ozone?

• Why is my C-90B air cleaner making a popping sound?

• How do I access the Supply Chain Execution Module?