Fred for Model Number mer6770aaw I got error messages F1-1 and F3-1 when operating the upper oven. I was advised to change the temp sensor. The oven still gives the codes occasionally. Does this indicate the control board is failing? Are there any tests that I can do to verify the problem before changing the board?
Answer Hello Fred. It may be the touch pad or the board. F1: Temperature runaway. Membraneswitch shorted. Alarm is continuous, ifcancel key is pressed alarm will stop, if faultstill present alarm will repeat. If membraneswitch is disconnected the alarm will onlysound for 30 seconds and stop.Correction: Test membrane switch and ovensensor, if OK, replace control.F3: Open or shorted sensor. The cancel keyresets the control and stops the alarm. Iffault is still present it will reactivate thealarm when a cook mode is chosen.Correction: Check sensor and wiring forshorted or open circuit. Read More... Answered by AppliancePartsPros.com | Monday, September 30, 2013