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Jessica WatkinsAug 25, 2025
How to fix communication failure between indoor and outdoor unit of Friedrich Air Conditioner?
- BBarbara ReidAug 26, 2025
A communication failure between the indoor and outdoor units of your Friedrich Air Conditioner can occur for several reasons: * The communication cable connector may be loose; ensure it is securely connected. * The connection between the filter board and the terminal might be incorrect or loose; verify the connection is correct and secure. * The communication cable itself might be faulty and need replacement. * The connection between the filter board and the outdoor control board might be incorrect or loose; verify the connection is correct and secure. * A failure in the indoor control board, PFC board, power board, or outdoor control board could also be the cause, requiring replacement of the respective board.
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