GE Profile JTP56S double oven. After about 15 yrs of use, started getting failure during self clean mode. Both ovens still worked fine in cook modes. About 1-3 hrs into the 4 hr clean cycle I would get F9 code, followed by an F2 code. Everything you read online says that F9 is an automatic door lock problem. However, the service sheet from this oven (tucked in the upper control compartment, great info with schematics, elec diagrams and part #s) says that F9 is "cooling fan stall while oven above 650F - open thermal switch in yellow leads". See pic. Shutoff power at the circuit breaker. There's 240V in that compartment when energized, so make absolutely certain the power is OFF. Removed the upper control face to access the upper control compartment. I noticed the upper cooling fan (there's two, the other is a smaller cooling fan in the center spacer compartment) and the screen behind it were very dirty. I'd say the screen behind it was at least 30% obstructed. Removed the air deflector (one screw). Removed the fan (4 screws). Then spent about an hour carefully vacuuming and cleaning everything; fan, screen, whole upper compartment. You can't remove the metal screen from your vantage point at the front of the oven but you can clean it pretty well with the fan removed. Also, cleaned the 2nd fan in the center spacer compartment without removing it. This 2nd fan has no screen and is smaller than the upper fan. Not required, but strongly recommended, remove both oven doors. Super easy on this model, put door in the slightly ajar "broil" position, grasp both sides of door (NOT the handle), firmly pull straight up. With the doors out of the way you no longer have to 'lean in' to access these hard to reach areas. My working theory is that the restricted airflow was allowing the temp to spike during the cleaning cycle, which tripped the thermal switch located in the fan's airflow, which shuts the cooling fan off, interrupts self-cleaning mode and gives the F9 error code for 'cooling fan stall' (or automatic lock failure if you believe the internet). Buttoned it all back up, ran a self-clean cycle on the top oven. 4 hrs later...flawless! Problem solved!! Next day, ran a self-clean cycle on bottom over. Again, worked like it was supposed to. I was thinking I might also have to replace one or more of the temp limit switches, but just the cleaning and subsequent airflow improvement were all that was required. Hope this helps someone else. Good luck!
I have this same Oven, and I'm also experiencing this issue. However, I have the Oven bottom unit, and a microwave top unit. The fan on my microwave will run to cool itself when the oven is in self cleaning mode, however the fan on top of the oven never activates at any temp, and it fails with the F9. I've cleaned the fan thoroughly with my air compressor as you suggested, but this hasn't helped. This leaves me with 2 possible failures, the control board, or the fan itself. I think I need to do the following.
Disconnect the fan connector and activate self cleaning function
Use a thermometer to keep track of the temperature in the enclose under the unit. When it reaches 205F, the low circuit should have voltage (W+R) with a multimeter.
When it reaches 240, the high circuit should have voltage (W + BK). (See the attached photos from the manual)
If both of the above hold true, the fan is dead and I should replace it. If I don't ever get voltage, then maybe the board is bad.
Does anyone have any other testing suggestions?
Finally replaced the fan, and that fixed the issue. Thanks for posting the pointer above as a starting point, that was really helpful!
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An F9 error code on a General Electric (GE) oven indicates that the oven's electronic control system has detected a problem with the automatic door lock.
The automatic door lock mechanism prevents the oven door from being opened when the oven is set for "Clean" mode.
The malfunction may be a jammed door lock mechanism, a pinched or broken wire, a faulty lock switch or a fault in the control board itself.
9 out of 10 times the lock switch has failed.
STEP # 1 - Disconnect power to the oven!!
. Repair wires as needed if defects are present.
Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.
Maximum oven door unlock time exceeded check the wiring between the EOC and the door lock.check for binding of the door latch assembly latch cam.you may have to replace the motor or the EOC.
SOURCE: monogram wall oven F9 error
“F— AND A NUMBER • You have a function error code. Press the CLEAR/OFF pad. Allow the
OR LETTER” FLASH oven to cool for one hour. Put the oven back into operation.
IN THE LOWER OVEN • If the function code repeats, disconnect all power to the oven for at
DISPLAY least 30 seconds and then reconnect power. If the function error
code repeats, call for service
Here is someone that had the exact same problem: intermittent F7 error code. I couldn't even get it to do the F7 error . There's a pretty good tech service sheet inside the control panel. I followed its procedure for testing the keypad (which was nothing more than pressing all the buttons and hearing it go "BEEP!" 
).
But the tech sheet did mention that intermittent F7 problems are usually caused by poor connections. So I pulled the ribbon connector off the control board and cleaned the copper connectors using a pink pencil eraser. That whupped that puppy!
But then I went out on another service call, same oven, different house. The pink pencil eraser trick didn't work on this one so I had to apply some of that famous Samurai gray matter. To identify the problem on this one, I cut power to the range and disconnected the ribbon connector that connected the touch pad to the electronic range control (ERC) board. Then I re-applied power and let it sit that way for 24 hours after which the customer was instructed to call me and report on the error code status of the oven. If no error code was reported, I knew the touch pad was the problem. If, on the other hand, the F7 error code came back, then I knew the (ERC) was the culprit. In this case, the error code did not come back during the test period and, using my keen, Vulcan-like powers of deduction, concluded that the touch pad was defective. I replaced the touch pad and problem solved!
It's important that you don't skimp the disconnect test because there's a big difference in price between the ERC and touch pad. So, you want to be right on this one. Ok, after you do this test and determine which part you need to replace, come and get it here.
**** this helps. :]
SOURCE: Cant open door getting F9 error code
door latch failure check wires to the door latch get the motor and or replace door latch good luck
SOURCE: code f9 on frigidaire self cleaning oven. what
Hi
Thanks for using FixYa. F9 error in your oven/range indicates an issue with the door locks assembly and/or the door latch. To start with check the door lock circuit, you can also try to jump start it to see if it's working. If it's not working then the Electronic Range control has gone bad and should be replaced, if it is working then the door lock circuit should be replaced. Please do rate the solution if the issue is resolved or post a comment for further assistance.
Thanks
Rylee
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