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So F9 would explain why your door latch isn't unlocking since F9 means your door latch has failed to move. Ok so it sounds like your door latch may have failed.
From what you have described your Frigidaire oven lock is stuck open and you are receiving error codes "F9" and "DR". The "F9" error code stands for runaway temperature (overheating). This could be an issue with your RTD (Resistance Temperature Detector) or the EOC (Electronic Oven Control). I would recommend performing a reset on your oven and you can do that by disconnecting from your oven for ten minutes. The "DR" code means that the door is not closed or the door latch is not recognizing the door is closed. This could be an issue with your door latch or control panel. If the reset does not help correct your issues I would recommend having a professional technician out to perform a proper diagnosis and repair.
From the Manufacturer
From what you have described your Frigidaire oven lock is stuck open and you are receiving error codes "F9" and "DR". The "F9" error code stands for runaway temperature (overheating). This could be an issue with your RTD (Resistance Temperature Detector) or the EOC (Electronic Oven Control). I would recommend performing a reset on your oven and you can do that by disconnecting from your oven for ten minutes. The "DR" code means that the door is not closed or the door latch is not recognizing the door is closed. This could be an issue with your door latch or control panel. If the reset does not help correct your issues I would recommend having a professional technician out to perform a proper diagnosis and repair. Best of luck! -Matt
The "F9" fault code is indicating the control has detected a problem with the Door Latch Motor assembly (key#89) or latch motor circuit. The door latch motor and door latch switches will need to be checked. The door must be closed in order for the door switch to energize. Try pushing inwards on the door and keep tension on it while starting a clean cycle.
F9 is a door lock error. Try starting and then canceling a clean cycle. If that doesn't work you need to check the door latch motor and switches. You access the latch motor and switches by removing the left side panel. It may just be a bent latch rod.
Hi Thanks for using FixYa.F9 is a door latch error,
you’ll need to check the door latch. This is a Problem with door lock circuit
such as pinched wire between Electronic Range Control (ERC) and door lock
switch. You’ll need to check wiring and replace the door latch assembly if
required. Please do accept the solution
if the issue is resolved or else revert for further assistance. Thanks Rylee
Check door latch components.The stove is not detecting a proper door close.Or else there might be some metal blocking the door from closing.It should solve itself in few hours else you might have to replace the door latch system.Good luck with the machine.Please do post comments.Also do rate the solution.Thank you in advance.
F9 indicates a problem with the door latch. There is a safety switch that will not allow the microwave to operate if it detects the door is not closed properly. Even though physically it may seem the door is shut, the safety switch is not relaying the message to the onboard computer. You need another door latch switch.
Here's what F9 code means:
1. Door lock safety circuit on ERC sensed Replace the door latch assembly
2. Door Lock Warning Check door lock circuit or Replace Clock
Try pressing and holding the door latch to unlock position and then press cancel for a few seconds. The latch should return to its original position.
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