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Dennis CortezJul 26, 2025
What to do if my Friedrich C-90B Air Cleaner fan and lamp are off?
- JJames NavarroJul 26, 2025
If your Friedrich Air Cleaner's fan and lamp are both off, ensure the power cord is properly plugged into a working standard household outlet. Test the outlet with another device to confirm it has voltage. Also, verify that the carbon filter is correctly installed and the top access cover is securely in place to engage the interlock switch, which is a safety feature and should not be bypassed. If these steps don't resolve the issue, the unit may need professional repair.