Frigidaire Range Error Code F500

The F500 code means the range has detected a loss of LIN bus communication between the Electronic Oven Control (EOC) and the Electronic Surface Element Control (ESEC) via the User Interface Board (UIB). This communication link is essential for the control boards to coordinate operation. The fault is triggered when the signal between connector P4 on the EOC and connector P7 on the UIB is interrupted or absent.

It is not recommended to continue using the range while the F500 code is active. The loss of communication between the EOC and the surface element control means the range may not respond predictably. Until the fault is diagnosed and resolved, avoid operating the appliance.

Repair costs depend on what component is at fault. If the issue is simply a loose connector, there may be no parts cost at all. If the EOC or UIB needs replacement, parts alone typically range from around $100 to $300 or more depending on the model, plus labor if a technician is hired. Diagnosing the wiring first is the most cost-effective starting point.

In some cases, yes. The first step is to locate the communication wire running between P4 on the EOC and P7 on the UIB, and verify it is fully connected and undamaged. If the wire and connectors look good and the code returns, the repair will likely require replacing one or both control boards, which is more involved and may be better suited to a qualified technician.

A power reset, such as unplugging the range or tripping the breaker for a few minutes, may temporarily clear the code. However, if the underlying cause is a damaged wire, corroded connector, or failed control board, the F500 fault will return once the range powers back up and attempts to re-establish communication between the boards.