Amana Dryer Error Code F:20

The F:20 code means the electronic control board detected no voltage at the heater relay during Diagnostic Test Mode. This code only appears when the dryer is run through its built-in diagnostic cycle, not during normal operation. It points to a problem in the circuit between the control board and the heating assembly, which could be a loose wire connection, damaged wiring, a failed relay, or a faulty heater assembly.

Because F:20 only appears during Diagnostic Test Mode, a reset may clear the display, but the underlying fault will remain. The next time the diagnostic cycle is run, the code will return if the wiring or component issue has not been resolved. Clearing the code without addressing the root cause will not restore proper heater function.

If the fix is simply reseating a loose wire connector, the repair can cost nothing beyond your time. If a wiring harness needs replacement, parts and labor can range from around $50 to $150. Replacing the electronic control board, if the relay has failed internally, is typically the most expensive repair, often ranging from $150 to $350 depending on the part and labor costs in your area.

Start by checking that all wire connectors are fully plugged in at the heater assembly and at the heater relay on the electronic control board. Reseat any loose connectors and inspect the wiring for visible damage. If the connections are secure and the code persists in Diagnostic Test Mode, further testing of the heater assembly and the control board relay is needed to identify the failed component.

The F:20 code appears only in Diagnostic Test Mode, so the dryer may still attempt to run normally. However, if the heater circuit has no voltage reaching the heating assembly, the dryer will not produce heat and clothing will not dry properly. It is best to diagnose and repair the fault before continuing regular use to avoid additional wear on components.