Maytag Dryer Error Code F4

F4 on a Maytag dryer means the Central Control Unit (CCU) is not receiving communication signals from the User Interface (UI) board. This causes the cycle selection and display functions to be disabled until the error is resolved. The problem is rooted in the communication wiring or one of the two control boards. The error must be manually cleared after repairs are made.

The F4 code disables cycle selection and display functions, which means the dryer may not operate normally or accept user input while the fault is active. Continuing to use the dryer in this state is not recommended, as the root cause of the communication failure has not been addressed. It is best to resolve the error before resuming regular use.

Repair costs depend on the cause of the communication failure. If the fix is simply reseating a loose connector, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a wiring harness or UI board can bring the total to $150 to $350 or more, depending on parts pricing and labor rates in your area. CCU replacement tends to be the most expensive repair in this diagnostic path.

If you are comfortable working around appliance electronics, you can start by inspecting and reseating the wiring harness connectors between the CCU and UI board, which requires no parts and costs nothing. If the wiring or connectors look damaged, or if the error returns after reconnecting everything securely, component replacement is likely needed and a qualified technician may be the safer option. Always unplug the dryer before inspecting any internal wiring.

A simple power reset is unlikely to permanently clear F4 because the code is tied to an ongoing communication failure between the CCU and UI board. The underlying wiring or component issue must be corrected first. After the repair is made, the diagnostic code needs to be manually cleared through the dryer's diagnostic mode before normal operation will resume.