Whirlpool Washer Error Code 99

Error code 99 on a Whirlpool washer indicates a WiFi Communication Fault. It means the main control board is not receiving any communication from the WiFi module board inside the machine. This fault disables smart and app-based features but may not prevent normal wash cycles from running. The first thing to check is the wiring harness connection between the WiFi board and the main control board.

In most cases, error code 99 affects only the WiFi communication subsystem and does not indicate a hazard with the core washing or motor functions. The washer may continue to operate normally for standard cycles. However, you should confirm the machine is running correctly before relying on it, and address the fault to restore full functionality.

A power reset, such as unplugging the washer for a minute and then plugging it back in, may temporarily clear the code if it was triggered by a transient communication glitch. However, if there is an underlying hardware issue such as a loose connector, damaged harness, or failed WiFi board, the code will return. A reset should be treated as a diagnostic step, not a permanent fix.

Yes, in many cases this is a DIY-friendly repair. Start by unplugging the washer, locating the WiFi board and the MC board, and firmly reseating the harness connectors on both ends. If the connectors are secure and the code returns, the repair will likely require replacing either the WiFi board or the wiring harness, which are tasks a confident DIYer can perform with basic tools.

If the fix is simply reseating a loose harness connector, there is no parts cost involved. If the WiFi board needs to be replaced, parts typically range from around $50 to $150 depending on the model, plus labor if a technician is hired. A full main control board replacement, if needed, generally runs higher, often in the $100 to $300 range for parts alone.