Frigidaire Range Error Code F7 20

F7 20 indicates that the Left Rear burner potentiometer circuit is open, meaning the control board is receiving no signal from the left rear burner's rotary control sensor. This prevents the appliance from reading the heat setting for that burner. The fault points to either a failed potentiometer, a wiring issue, or a problem with the User Interface Board.

The left rear burner should not be used while this fault is active, as the control system cannot properly read or regulate the heat setting for that burner. Other burners and oven functions may still operate normally, but continuing to use the affected burner is not recommended until the fault is resolved.

If only the potentiometer needs replacement, parts typically run in the range of $20 to $60 depending on the model, with labor adding $75 to $150 if a technician is hired. If the User Interface Board is the failed component, board replacement can cost between $100 and $250 for parts alone, plus labor. Getting a diagnostic visit from a certified technician will give you a firm estimate for your specific situation.

A knowledgeable DIYer can start by unplugging the range and visually inspecting the wiring and connectors leading to the left rear potentiometer for obvious damage or loose connections. If the connector just needs to be reseated, no parts are required. However, replacing the potentiometer or UIB requires some disassembly and comfort with appliance electrical components, so a professional technician is recommended if you are unsure.

Resetting the range by cutting power at the breaker or unplugging it for a few minutes may temporarily clear the code, but it will return if the underlying fault in the potentiometer circuit is not repaired. The open circuit condition is a hardware problem that must be physically corrected to permanently resolve the error.